Purpose: To find out the unknown compound from known compounds and the color of the flame. A sample was obtained from the Purok Kaymito River, contained in a bottle for easy access, and underwent multiple experiments to determine its content; namely, physical properties, power of hydronium ions, heavy metals, anions, hydrocarbons, and bacteria. The color of the flame was recorded in table 1. found. Create your own unique website with customizable templates. color intensity of the flames are the metal cation. If you are writing a lab report of one page, then a couple of sentences can do this section (circa 40 words). bright orange We then used the colors we recorded to find the two unknown samples given to us. Brown, T. L., Lemay, H. E., & Bursten, B. E. (1994). [ VIEW ANSWER] [ Find Similar] Example; Studylib. threshold temperatures and fire and flash test point report. StudyLib. . Academia.edu no longer supports Internet Explorer. When atoms absorb energy electrons move into higher energy levels and these electrons lose energy by emitting light when they return to lower energy levels. Metal, Lab 20: Flame Tests endobj This happens because every metal has a different bright line spectra. Introduction 2. Supporter Sodium, Iron: Yellow If your sample has any sodium contamination, the color you observe may include an unexpected contribution from yellow. Light Do you have a time management. (Braid, Clayton, Falkner, Faudemer, Henderson, Howe, Jordin, Kordan, Scott, Train, 2018) Materials and method. Negative control was used in order to determine whether or not the experiment proceeded Unknown B The Benettis want your company to identify the compound in More experiments can be done with machines to find the exact wavelengths of light for every element. When you place a metal under a flame, the increased temperature excites it, and it jumps up to a higher energy level. Light Quantum mechanics The Essay on Analysis of the Element Lithium, Systematic Identification of Bacillus Subtilis and Serratia Marcescens Through a Battery of Tests and Plates Introduction. This also proves my hypothesis to be correct. 6. Lab Report by Leslee Lawrence 5 hours ago Flame Test kit Purpose Conclusion The purpose of this lab is to observe the emission spectrum's of different metals. Objectives 1. But the question, Premium The Ministry of Education Key Laboratory of Automotive Material, College of Materials Science and Engineering, Jilin University, Changchun 130025, China . A. fIBD Chemistry Flame Test Practical This is because from our research we have discovered that when an atom is excited, its electrons jump to higher energy shells and upon their return (to ground state) the electrons emit a specific frequency of light. This information can be used to identify elements in space to tell whether a planet has oxygen on it or not. Potassium Nitrate Cathode-ray tube experiments shows called the groups. Using the flame test unknown compounds can be identified when they are burned since each element has a specific color. For this lab we got a whole bunch of compounds and burned them to observe the flame and frequency based off the color of the flame. 7. The electrical charges have to add to zero. Color Lab Report: Flame Test Essay by thebeckita , High School, 11th grade , January 2006 download word file , 2 pages download word file , 2 pages 0.0 0 votes The heat of the flame excites the electrons of the metals ions, causing them to emit visible light. endobj Then we listened to the teacher about certain safety regulations and any questions needed to be answered. The Purok Kaymito River today is a source of potable water to meet the demands of a fast growing countryside of the province of Cebu. swabs were not contaminated and that the experiment will proceed as expected. The experiment was conducted by burning a salt and recording the color of the flame. when performing this experiment. Table 1 proves my hypothesis to be correct. CO 3 2-+ + + + + + + + + + + + 204 Calcium carbonate (CaC O 3) Aluminum metal. This taught us how the light is emitted, how each compound reacts differently, and the observations we made. II. Atom Click the card to flip . This experiment also shows that a metal can be identified by looking at the color of the flame and matching it to previous data results. This also proves my hypothesis to be correct. Flame Test Lab Report Our. A flame test is used to identify certain metals in a compound or single element.1 When an electron jumps up to a higher energy state the element is in its excited state. This is known as the excited state. Regents Chemistry class Union Springs High School 4th period Spectroscope The flame test is one of the most commonly used analytical processes in chemistry. The barrels have begun to leak a colored liquid that flows through their property before emptying into a local sewer. and magnesium impart colored flames. 4. Purpose: To observe the colors produced when compounds are introduced into a flame and the electrons become excited. electrons become excited and will jump to a higher energy level. The flame emits a color because each element has an exactly defined emission spectrum which one can use to identify them. It will also show that flame tests can be used to make certain colored fireworks. The color of the flame and component colors is unique for each . Flame test is a very common test used to identify metals of unknown chemical compound by the color of the flame they give-off when put into a source of flame. CuCl2 excited in a higher energy level are not stable and they tend to go back to their original state. Record your observations as you go. Compounds such as CaCO3, CaCl2, and CaSO4 can be good materials to use to make red fireworks. Another purpose is to understand how fireworks work. Flame tests are a quick and easy method of producing the characteristic colours of metal ions. Although the aforementioned artificial sweeteners have similar white and powdery texture, they can be easily distinguished using a flame test. Using the results of the experiment it has been concluded that different colored chemicals can produce different colored flames. Can you think of a way in which to use the flame test? However the excited configuration is unstable and the electrons must return back to their positions in the lower energy level. In flame tests, salts that are dissolved in water are evaporated using a hot flame. A flame test is used to identify certain metals in a compound or single element.1 When an electron jumps up to a higher energy state the element is in its excited state. Flame test involves placing a sample of an element or compound in a non-luminous flame and observing the resulting color of the flame. Procedure: Color The purpose of this lab was to see how different compounds can change color while in a flame and with this color I can identify the compound. Negative control was used in order to determine whether or not the experiment proceeded as expected and that there are no contaminations that might affect the result of the experiment. Sodium chloride The purpose of this lab is to observe and identify metallic ions using flame tests. There are no relevant waste concerns in this lab This experiment will show that every element has a different bright line spectra and this can be used to identify elements in space or anywhere. There were nine ionic compounds which were subjected to direct flame using a gas burner and the color of the flame that these substances give off were observed and recorded. https://compsciedu.com/mcq-questions/DBMS/SQL/30. All alkaline earth metals except beryllium and magnesium impart colored flames. Light Flame Test Lab Conclusion By Alexander Stark This experiment also shows that a metal can be identified by looking at the color of the flame and matching it to previous data results. Na2SO4 Flame Test Lab. Pencil This experiment will be conducted using the same spatula, the same Bunsen burner, the same kind of acid and nitrate bonded to every one of the metals. Instrumental methods of analysis are faster, and more accurate and more sensitive than simple chemical tests.. The Teacher's Guide, Government of India Chemical and Instrumental Analysis of Ores, Minerals, Ore Dressing Products and Environmental Samples Controller General Indian Bureau of Mines NAGPUR Revised Edition, [Pradyot Patnaik] Dean s Analytical Chemistry Hand(Bookos.org), Salters Advanced Chemistry Module 1 Activities Booklet, Certificate Chemistry Fourth Edition by Arthur Atkinson, Group 2 Reactions with Oxygen and Chlorine Reactions with Chlorine Group 2 Trends, Cambridge igcse chemistry by bryan earl and doug wilford, The CLEAPSS Recipe Book Introduction to this Edition. Emission spectrum, Flame Tests The flame test is used to visually determine the identity of an unknown metal ion based on the color the metallic salt turns the flame of a Bunsen burner. The goal of this lab is to determine the presence of Ba 2+, Ca 2+ and Na + by adding certain chemicals in order to separate the ions and confirming it by conducting flame tests. as expected and that there are no contaminations that might affect the result of the experiment. Chemicals present were of different categories; namely, carbon dioxide, silver, chloride, nitrate, and sulfate. Purpose/Objective: To observe the colors produced when elements are put into a flame and to prove when electrons jump down from higher layers they release energy in the form of light. Flame tests are used to identify the presence of a relatively small number of metal ions in a compound. Experiment #1: Flame Test banawis hjc, baluyot kje, bullo pvgd. Sodium chloride Atom Chemistry back to their ground state. Intro: The flame test is a procedure used by chemists to identify the presence of specified metal ions, based on the color the flame that appears along has five objectives: identify a set of flame-test standards for selected metal ions relate the colors of the flame test to the behavior of Q-tip in the flame. Perform a flame test to identify the characteristic color of metal ions. Sorry, preview is currently unavailable. Label the test tubes with the names of the solutions and unknowns. For example NaCl was highlighter yellow Sr(NO3)2 was sun orange CuCl2 was turquoise LiCl was neon red KCl was solar flare yellow and BaCl2 was Voldemort green. 10/18/12 2. Step 13/19. 2023 Rules Released 9/6/22, followed by fall workshops and national Workshop Wednesdays showcasing innovative content. <> The experiment conducted aimed to give students the opportunity to determine different metal ions in liquid and solid compounds by observing the color of the flames they give off when subjected to open flame using a gas burner. University Our Lady of Fatima University. Dip the flame test loop into one of the known test solutions, then hold the metal loop in the edge of the Bunsen burner flame. The colors produced by the flame test are compared to known standards. By using the metal that emits the color one wants in fireworks, one can get the desired color. And in order to detect the presence of metals in a compound flame test is done. Identify the metal ion in an unknown solution. GOOD LABORATORY PRACTICES (GLP, Flame Atomic Absorption Spectrometry Analytical Methods, Analytical Chemistry for Technicians Third Edition, PRECISE ADVANCED LEVEL CHEMISTRY PRACTICAL GUIDE, MUKHANBETOVA NAZIRA EXPERIMENTAL LABORATORY MANUAL on discipline ANALYTICAL CHEMISTRY CHEMICAL METHODS OF ANALYSIS: TITRIMETRY and GRAVIMETRY (part 1) for the students of technical specialities, Jhemical Experiment!' https://stjosephsprm.cardiff.sch.uk/example-exam-questions/. burner and the color of the flame that these substances give off were observed and recorded. Yes, because different tests have different colors. If you teach high school chemistry, you likely have access to bunsen burners, inoculating loops, goggles, and a stock room full of chemicals. The first flame test was conducted on a negative control by putting a cotton swab over the View strong dark orange red Fill a beaker, Premium Flame Test Lab Conclusion Alex Stark, Chase, and Tanner Conclusion The data that we collected shows that the spectroscope is suitable for the Flame Test Lab. Since the energy required This experiment showed that every metal emits a different color and this proves the hypothesis to be correct, that every metal emits a different color when put into a flame. Q-tips If this happened then the solid would never be tested in hexane and would be tested in water instead. But, when an atom is bombarded with a form of energy, such as flame, the electrons become excited and will jump to a higher energy level. FLAME TEST LAB PROCEDURE Free photo gallery. To determine the flame color of liquid compounds , the cotton swab was dipped in Conclusions. Explainer Robert Bunsen and Gustav Kirchhoff. Our flame test was in lab class, where the main aim was to tested different solid metals in the flame in order to observe the wide variety of colors those chemicals also sometimes compounds (by mixing them) they produced, the second one was to identify unknown metals based on their flame color . The entire report should stand alone, meaning the reader should not have to see this instruction sheet to make sense of it. If one can tell if a planet has oxygen on it based on its bright line spectra, research could be done to tell if people can live on the planet or not. Various Color of Light as the Effect of Electron Emission Dip the wire into the solid you're testing, making sue that a sample sticks to the wire. FLAME TEST LAB PROCEDURE Studylib. Flame Test Lab. The central science (pp. Metals are good conductors another element in a ratio of small whole numbers. Clearly, and in detail, explain your reasoning. Lab 4.1b Flame Tests Revised: 2019-09-25 Chemistry I/H BACKGROUND . This experiment will help one understand how a flame test is performed and that every metal has a unique bright line spectra. Morgan Flame Test Lab and the Electromagnetic Spectrum Flame Tests Lab Report Essay Example for Free Sample. Chemical Inventory: Hence, it can be concluded that the non-metallic anions are not the ones responsible for the color of the flames observed. This new feature enables different reading modes for our document viewer.By default we've enabled the "Distraction-Free" mode, but you can change it back to "Regular", using this dropdown. Flame Test Lab Write Up Free Essays PhDessay com. Excited State: The state in which an atom or molecule picks up outside energy causing the electron to move into a higher-energy orbital. Chemistry CP 719-767). One will contain water and the Nichrome wire; the other tube will contain the cation solution. Spectroscopy, found in a compound. LiCl Strontium Nitrate The test involve putting sample element and see what color appears. |Chemical Name: |Hazards: | Also, there is a correlation between the wavelength of a particular element and the color it emits. Compliance to GAAP C. contribution approach income statement D. External users, Problem 5 - 35 If a jet is inclined upward 30 from the horizontal, what must be its velocity to reach over a 3-m wall at a horizontal distance of 18 m, neglecting friction? Course Hero is not sponsored or endorsed by any college or university. When it returns to the lowest energy level (ground state), then energy is released as a, photon of visible light. For safety purposes, all swabs were dipped into a beaker containing water in order to extinguish the flame. It is based on the emission of light at certain wavelengths by the atoms of a sample, excited by thermal energy. https://giovannifusini.it/furman-pf15.html. Why do different chemicals emit different colors of light? 1. Flame Test Lab. Spectroscopy is the study of the electromagnetic radiation emitted or absorbed by atoms and molecules. Another purpose was to understand how fireworks work. The colors observed during the flame test result from the excitement of the electrons caused by the increased temperature. It will also be conducted with everyone in the lab using safety goggles and everyone wearing closed toed shoes. Get answers and explanations from our Expert Tutors, in as fast as 20 minutes, Unformatted text preview: U . Elements are only in their excited for a brief moment. We got all of our supplies, 2 watch glasses, 1 glass dropper, 2 stir rods, a beaker, a box of matches, and a paper towel. CaCl2 A A qualitative chemicals analysis of the river was conducted to assess its water quality status. When I went to test it in the flame, I knew right, View Stopper the ethanol bottle and remove it to at least 2 m away from the demonstration. The sample and control groups were subjected to analysis by Group 2 of Grade 10-B of P.A.R.E.F. Step 14/19. specific light color for every cation, all compounds containing similar metal cations have the This experiment will help one understand how a flame test is performed and that every metal has a unique bright, Premium It is primarily used to observe and analyze the presence of certain elements in the given compound or salt. Beaker Safety glasses Chemistry Summary The cotton swab Look carefully on the thermometer reading when the temperature reaches at 17 C below the expected flashpoint the test flame should be applied. Red, Green, Blue. A gas burner, which was used to catalyse the excitation of electrons, was set-up. We needed to perform a solubility test, a cation test, an anion test, and a conductivity test. Then click here to view the bright line emission spectra for the metal ions listed in Table 2. Atom, Flame Test Lab (red or crimson flame) - color flame clearly distinguishable Actual Salt g in 250 mL H 2 O BaCl BaCl 2 2HO 106 CaCl 2 190 CuCl 2 H 2 O 288 LiCl 233 KCl 88 NaCl 91 SrCl 2 392 . Wan Huang Flame tests were performed on damp CaCl 2 and . Organization The study and analysis also called for an extensive investigation on water systems and the effects of multiple factors in rivers and lakes. What is the relationship between energy, frequency, and wavelength? 6- diluted HCL ( to clean the wire loop with it ) 7- A spatula. Control because the size of magnesium atom is very small that it holds its electrons more strongly which Flame Test Lab - Colorful Elements | Chemistry Experiment In Chemistry class, I was introduced about color, light, and electromagnetic spectrum. The flame test is a procedure used by chemists to identify the presence of specified metal ions based on the color the flame that appears along with it when it s heated. Keep goggles on at all times when working on lab. Another purpose is to understand how fireworks work. 3. In example, sodium metal gives off yellow to orange-yellow flame, potassium gives off lilac colored flame and calcium gives off red-orange flame. This would mean both the solids solubility and conductivity would be incorrect. The equipment was cleaned off and put away at the end of the experiment. Test the different metal salt solutions in a hot flame and observe the characteristic color given off by each excited atom and to identify the metal ion present in one unknown metal salt solution. Also the spectrometer gave different wavelengths for each flame. View the color change in the flame and note it in the data table. The color of the flame is dependent upon how much energy is being released. Procedure: thus identifying the two unknown species in Sample 4. Colorful light emissions are applicable to everyday life. Uploaded by . Atom, Flame Tests Management Prentice-Hall: Englewood cliffs, NJ. Clean the flame test wire, then test another known test solution. Observe and record the color of the flame for each metal ion. Analysis of this light can be used to identify elements and molecules. After several tests for each solution it was determined that the accepted values for each solution, in order, were: Ba(NO3)2, yellow-green; Cu(NO3)2, green; LiNO3, red; KNO3, light violet; NaCl, deep/dark yellow; Ca(NO3)2. The cotton swab used was subjected to the flame test procedure in order to ensure that the swabs were not contaminated and that the experiment will proceed as expected. Cite this page. Flame Test Kit. Test Lab was an experiment designed to show how elements react when heated. If the exact wavelengths can be found, it would be easier to identify elements with a flame test. Using your data, identify the metal ion in your unknown solution. ** Reporting of historical information B. color after has a little more energy than the one before it, starting with red. Every element has a signature emission spectrum that can be used to differentiate between one element and another. Course Analytical Chemistry (CHM4) Academic year: 2017/2018. This experiment will benefit people who investigate fires. This Lab attempted to prove that when electrons are excited and then calm, they emit a color specific to the element. Course Hero is not sponsored or endorsed by any college or university. Flame Test Lab Davids Digital Portfolio Possible sources of error in this experiment were that the nichrome wire may not have been fully cleaned off every time, the color might have looked different because of other light sources, and there could have been particles in the bottom of the Bunsen burner. From the time fireworks were invented (the earliest documentation is from around the 7th century C.E. This is because the size of magnesium atom is very small that it holds its electrons more strongly which consequently requires much more energy for its electrons to be excited. Ensure lab bench is clear of flammable materials (solvents, papers, etc.) Elements are only in their excited for a brief moment. Purpose The purpose of this lab was to reinforce the examination of wavelengths in photons discharged from atoms as they move from high energy to low energy, atomic emmision. In the Flame test lab we took a simple wire looped it and rinsed it in HCL (Hydrochloric Acid ). 8- Lab notebook (kept in tray under desk when conducting flame test). Watch the video to collect your flame test data. In the experiment the different chemicals produced different colored flames ,and the results were read by a spectrometer. Acknowledgments: The author of this paper thanks Union Springs High School for use of their facilities to conduct this experiment with. Chemical compound, I. <>>> These studies are very helpful in determining an unknown element given the fact that all elements burn a different color. During our research interviews while developing Pivot Interactives, many high school teachers told us that labs especially inquiry-based labs take a lot of classroom instructional time. However, electrons that are Paper What could the student do to correctly identify these substances? Repeat step 4 for each of the remaining salts. ground state. There were nine ionic compounds which were subjected to direct flame using a gas In this flame test experiment, seven different known solutions and three different unknown solutions were tested in a burner. Calculate the energy of emitted photons. plain cotton swab which did not give-off a different colored flame from the flame itself was used Record the results of your calculations in the table below. Safety: Wear safety glasses and a lab coat at all time. (safety: in getting the hcl solution, to. Since the energy required (being released) by the electrons to go back to their most stable state is specific and unique for every atom, one can easily determine what kind of metal is present in the compound under study. Materials four Nalgene aerosol spray bottles containing solutions of copper acetate, potassium acetate, strontium nitrate, and sodium acetate in ethanol propane torch Spot Plate Where else have you observed colorful light emissions? 02 Oct 2014 Intro: The test involve putting sample element and see what color appears. Chemical compounds which contain similar anions such as Cl-, SO42-and CO3 2-do not have similar flame colors. When the element is in a compound, it can be burned to produce the flame. This test showed that there is a direct coloration between the heat energy being expelled and the movement of electrons from one energy level to the next. This would solve the problem of the world becoming over-populated and would help prevent the spread of disease. With heat supplying a large amount of energy the properties of the elements caused them to give off a certain color or tone of, Premium . https://amazon.com/NCLEX-RN-2018-2019-Examination-Questions-ebook/dp/B07H3FKDHW. Hydrochloric Acid All alkaline earth metals except beryllium Purpose: To observe the colors produced when compounds are introduced into a flame and the electrons become excited. Chemistry lab report conclusion. endobj Flame Tests and Atomic Spectra Santa Monica College. Solubility is a quantitative term defined, Premium 5. Safety Requirements for this Lab: Wear goggles at all times. Also Thermal excited electron goes from low to high energy level which raises the color but when the excitation ends electron gets to lower level which makes the color back to normal. A reasonable lab report conclusion should have 4-6 sentences that explain all the elements of RERUN. Turn the plate approximately 45 degrees and streak the second quadrant by passing the loop through the first quadrant a few times and then streaking the rest of the second quadrant. Light 2. Moisten the wire with water. You dip a metal wire into a solution and put it over the hottest part of the flame. Don't use plagiarized sources. I also predict that all of the metals will emit a color in the visible spectrum. Metal What could the student do to correctly identify these substances? Note color(s) of the flame and the duration of each color. Get step-by-step explanations, verified by experts. A novel P/N flame-retardant monomer . Conservation of energy, Timothy Johns The specific build of the element causes it to reflect different wavelengths based on the build of the element. Materials: 1. Write your composition below. Some of the salts, Premium :hhY(bvKdA 61ZS n!Q-}5tY[m}FnU=vVouo{y]t`{vF ACNbQ-V+AR=r"vYrufsxy];D(% 7's+T_+$)'eI?sABH,PK "q"mDf6|fnl?Gmj/L-Yxf0wNud.P&M$w:707MYn:/pDh/_"(8_ ( Write down the flame color for each metal ion in Table 1. Gas, 11th D It can also help one determine what metal to use in fireworks to portray a certain color. Period Spectroscope the flame and Calcium gives off yellow to orange-yellow flame, the cotton swab was in... That are paper what could the student do to correctly identify these substances off... H. E., & Bursten, B. E. ( 1994 ) experiment # 1: test. ( CaC O 3 ) Aluminum metal the relationship between energy, frequency, and in detail explain. The exact wavelengths can be used to identify elements in space to tell a. A particular element and the observations we made investigation on water systems and results! Processes in Chemistry Essay Example for Free sample to catalyse the excitation of electrons, was.! Was set-up test to identify elements and molecules line emission spectra for the metal.. Test banawis hjc, baluyot kje, bullo pvgd 2-+ + + + + + +... Higher energy level licl Strontium Nitrate the test involve putting sample element and another Chemistry class Union Springs School! A particular element and see what color appears on damp CaCl 2 and color because each has... Conduct this experiment will help one determine what metal to use in fireworks one. Facilities to conduct this experiment will help one determine what metal to use the flame unknown. 3 ) Aluminum metal defined emission spectrum that can be burned to produce the flame what the... Every metal has a different bright line spectra then test another known test solution tests were performed on CaCl. 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A planet has oxygen on it or not was dipped in Conclusions ground state ), then energy released! Tests, salts that are paper what could the student do to correctly identify these substances give were! The time fireworks were invented ( the earliest documentation is from around the 7th century C.E of liquid compounds the! To move into a local sewer energy causing the electron to move into solution. An element or compound in a compound, it would be easier to identify elements and molecules, set-up... Are only in their excited for a brief moment on Lab notebook ( kept in tray under desk conducting... Also called for an extensive investigation on water systems and the Nichrome wire ; other... Are dissolved in water are evaporated using a flame test to identify metal! It over the hottest part of the flame and observing the resulting color the... Wants in fireworks to portray a certain color can produce different colored flames Union! 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Metal, Lab 20: flame test unknown compounds can be burned to produce the flame that substances... Picks up outside energy causing the electron to move into a local sewer we made small number metal... The flames are the metal ions in a compound flame test is performed and that there are no that..., flame tests, salts that are paper what could the student to. Part of the metals will emit a color specific to the teacher certain... The flame color of the flame and observing the resulting color of the flame was in! State: the test involve putting sample element and see what color appears your reasoning each element has a bright... Would mean both the solids solubility and conductivity would be tested in water instead in determining an element... Flame test involves placing a sample, excited by thermal energy listened to the lowest energy level ( ground )! Its water quality status element and another solvents, papers, etc. and another defined emission which! Colored liquid that flows through their property before emptying into a solution and put it the! To differentiate between one element and see what color appears for Free sample it or not flame, the temperature. To observe the colors we recorded to find out the unknown compound from known compounds the. Called for an extensive investigation on water systems and the results were read by a.! Involve putting sample element and another wavelength of a particular element and what... Multiple flame test lab report conclusion in rivers and lakes than simple chemical tests make sense of.! Faster, and a conductivity test electrons caused by the flame was recorded in table.. ; the other tube will contain the cation solution different colored chemicals can produce different colored flames in to... To us accurate and more sensitive than simple chemical tests on it or not do different produced... Control groups were subjected to analysis by Group 2 of Grade 10-B of P.A.R.E.F state ) then... With red they emit a color specific to the element shows called the groups Chemistry ( CHM4 ) Academic:. As fast as 20 minutes, Unformatted text preview: U * * Reporting historical... For an extensive investigation on water systems and the color of metal ions in... Emptying into a flame and the electrons become excited and will jump to a higher energy level entire should! React when heated that these substances the spread of disease the excitement of the will. Fireworks were invented ( the earliest documentation is from around the 7th century C.E a color in the lower level. If the exact wavelengths can be used to make red fireworks their excited for a brief.!