the color. Inside each firework are small packets filled with chemicals‚ mainly metal salts and metal oxides‚ which react to produce an array of colors. When heated‚ the atoms of each element in the mix absorb energy causing its electrons to rearrange from their lowest energy state to a higher excited state. As the electrons plummet back down to their lower energy state the excess energy gets emitted as light. Each element releases a different amount of energy and this energy is what determines
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HOW THE PERIODIC TABLE OF ELEMENTS HAS CHANGED OVER TIME? The periodic table has changed a lot since the first one was created‚ it has also expanded and has more elements it has also changed the weight of other elements.‚ it was first created in rows and columns and all different confusing symbols and equations‚ the periodic table today is a lot more structure and easier to understand. The periodic table has is always being changed s new discoveries are being made and new theories are being developed
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Chemistry Laboratory Report Classification of Chemical Substances Student: Saule Sadykova Lab Partner #1: Temirlan Atambaev Lab Partner #2: Almas Ospanbekov Instructor: Eugene Douglass Nazarbayev University Purpose The aim of this experiment is to investigate the properties of several substances with the purpose of determining whether they are molecular‚ ionic‚ macromolecular or metallic. Introduction Chemical substances could be named ionic‚ molecular or metallic substance‚ based
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I https://www.oppapers.com/join.php#submit . Experiments with Metals and Ions of Metals Introduction Metals are similar in their physical properties in general‚ but they are not identical. Most of the metals are solids; few of them are liquids‚ such as mercury and cesium. Density of metals is not similar also. For example‚ sodium has density of 0.97g/cm3 while lead has density of 11.4g/cm3. Melting point of sodium is 98.0oC while for lead it is 327.6oC. Metals have the capability
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products. B. Statement of the problem. What are the other alternatives that we can do on that banana peels aside from making it as fertilizer? C. Scope and Delimitation Base on our knowledge‚ the magnesium and potassium that are on the table of elements‚ gives vitamins on our tooth. We think that if potassium and magnesium gives vitamins on our tooth‚ it is possible that it can whiten our tooth D. Significance of the study The Benefits of the banana peel to whiten our teeth is to make some people
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My element name is Boron. My slogan is my symbol is B! I ’m right at the top of Group IIIB! When the first time seen my element is in the PT. boron symbol is B and is in Group IIIB. Two of them are having B. It looks very simple. I think that is very fun idea‚ so I just use this for my slogan. Boron is a chemical element with chemical symbol B and atomic number 5. It is in period 2‚ Group 13 element that has properties which are nonmetals. The name boron comes from the Arabic and Persian words for
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Observations of Chemical Changes Experiment 1 Chemistry 111 September 3‚2014 Ashley Mattox Abstract: The purposes of this lab is to observe the reactions of some common chemicals contained in consumer products and observe the macroscopic changes these chemicals undergo. Purpose: The purpose of the lab is to be able to interpret underlying macroscopic changes in terms of the behavior of atoms and molecules and also to learn how to separate mixtures into their component
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many difficulties when they perform their duties‚ especially when they clean their clothes‚ whereas‚ today everybody cleans her or his clothes by washing-machine which makes their life more comfortable. moreover‚ it protects their hands from chemical elements which is in the soap of washing clothes‚ so‚ washing-machine is so important and required. Secondly‚ students are the most people who need technology in their life‚ especially the Internet‚ today’s students are more open for the world rather
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Maggie Mitchell IB Chemistry Prd. 5 THE HALOGENS LAB Date: 9/11/13 Purpose: The purpose of this experiment was to observe and record the halogens’ (NaF‚ NaCl‚ NaBr‚ and KI) reactions with the chemicals Ca(NO3)2‚ AgNO3‚ and NH4OH and use these observations to identify an unknown halogen. Data: (see next page) TABLE 1: REACTIONS OF HALOGENS WITH CA(NO3)2‚ AGNO3‚ AND NH4OH REACTION NAF NACL NABR KI REACTION W/ CA(NO3)2 solution turns cloudy and precipitate forms clear precipitate
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“excited”. When they fall back closer to the nucleus (back to their ground state)‚ they give off this extra energy as light. Why is the flame test handy? It’s handy because we can use the colors emitted by atoms to tell different elements apart. Can we tell every element apart from this test? Not with our flame test‚ but the idea of spectroscopy allows us to do so with a good detector and knowledge of spectral lines. Each metal will have it’s own unique spectral lines that correspond to the distances
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