Periodic Table Trends Quiz 1. The most reactive metals are located in the lower left hand corner of the periodic table 2. Which of the following atoms listed below has the largest atomic radius? Ca 3. Compared to the atomic radius of a rubidium atom‚ the atomic radius of a strontium atom is smaller. The smaller radius is primarily the result of the strontium atom having greater effective nuclear charge 4. An element is most likely to have properties similar to those of another element
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Getting To Know the Periodic Table Objectiv0e: To be able to use the periodic table to identify and classify elements and to use the periodic table to predict the behavior of elements Procedure: 1. Number the groups. 2. Number the periods 3. Draw a heavy black line between the metals and nonmetals. 4. Write the name of each of the following groups above the number: Group 1 alkali metals Group 2 alkaline earth metal Group 3-12 (collectively) transition metals Group 16 chalcogens
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What is Krypton? Some might say it is the planet Superman is from‚ but it is actually a chemical element. Krypton is one of the rarest gases on Earth which makes it very expensive. It can also be found in Mars’s atmosphere‚ but only makes up 0.3 parts of a million. Krypton was discovered in 1898 by Morris Travers and Sir William Ramsey. It was named after the Greek word‚ kryptos‚ which means “hidden”. The basic facts: Noble gases carry the trait of not reacting with many elements and Krypton
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Sodium was first discovered by Sir Humphrey Davy in 1807. This element is the 11th element found on the periodic table; located in group 1 and period 3. Its chemical symbol is Na and it is classified as a metal. Metals‚ by definition‚ means that they are elements that are luster‚ lose electrons very easily‚ malleable‚ ductile‚ and are great conductors of heat and electricity. Sodium is found in group 1 of the periodic table because the electronegativity of sodium is very low. This allows it to form
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In 1860‚ the first instrumental analysis was performed by Robert Bunsen and Gustav Kirchoff who used flames tests that led to the discovery of the elements rubidium (Rb) and caesium (Cs). After this‚ this method was used everywhere to find the chemical make ups of many substances. For example‚ in 2007 there was a huge problem where tainted pet food would cause many pets to become ill. Qualitative analysis was used and it was discovered that Melamine was found in the pet food which altered the results
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4Chapter 2: the Structure of the Atom A) Matter 1. Matter 2 3 Element Compound 4. Atom 5. Molecule 6. Ion 7. Diffusion Is anything that occupies space and has mass. Is made up of tiny and discrete particles. There are spaces between these particles. These particles may be atoms‚ molecules or ions. Matter exists in three states solid‚ liquid and gas Is a substance that consists of only one type of atom Is a substance that contains two or more elements that are chemically bonded together Molecule
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Periodic Table of the Elements Group 1 Group 18 1 1 1.00794 1 2 H 1s1 Hydrogen Group 2 Atomic Number Key 30 65.39 2 Atomic Mass 4.002602 0 He Group 13 Group 14 Group 15 Group 16 Group 17 1s2 Helium 3 2 (6.941) 1 4 9.012182 2 Li [He]2s1 Lithium Be [He]2s2 Beryllium Zn [Ar]3d104s2 Zinc Oxidation States Symbol Electron Configuration 5 10.811 3 6 12.0107 ±4‚2 7 14.0067 ±3‚5‚4‚2 8 15.9994 -2 9 18.9984032 -1 10
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Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
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Famous Scientists’ List Name | Birth/Death | Achievements | Albert Einstein | 1879 - 1955 | He is arguably at the pinnacle‚ if the popularity of all the scientists is taken into account. He demonstrated solutions to a trio of mind-boggling topics in Physics in 1905 and shot into the limelight. | Sir Isaac Newton | 1642 - 1727 | "Philosophiae naturalis principia mathematica" called "Principia" is acknowledged as the greatest scientific book ever published. Sir Isaac Newton wrote this in 1687
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Index: Introduction.......................................................................page 1 What is radiometric dating? ............................................page 2 Theory on which it is based..............................................page 2 How does radiometric dating work.................................page 3 How accurate is it..............................................................page 4 Problems and shortcomings of radiometric dating.........page 5 Conclusion.....
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