pull that the protons give the electrons the smaller the atomic number.2. In Part II of this assignment‚ you graphed the atomic radius of some elements from group 14 on the periodic table. What is the general trend for atomic radius going down that group? (2 points) It looks like the atomic radius is bigger when the atomic number in the same column is bigger. This is probably because of the electrons in the inner shells. They give more shielding for the outer electrons so that they could spread out
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ATOMIC NUMBER *in the relation to the ELECTRON STRUCTURE of the atoms *in the relation to their CHEMICAL PROPERTIES (Criteria Used For Placing ELEMENTS in the Periodic Table) 1. ATOMIC NUMBER 2. NUMBER OF SHELLS (PERIOD) 3. NUMBER OF OUTER ELECTRONS (GROUP) 4. CHEMICAL PROPERTIES OR (REACTIVITY) *** PERIODS They are HORIZONTAL ROWS of elements. There are SEVEN (7) periods numbered 1 to 7 *Elements of the one period all have the SAME NUMBER OF ELECTRON SHELLS. *Going ACROSS a period each
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Electromagnetic Spectrum Project Introduction: In this project you work for a company that produces and sells electromagnetic waves (Waves-R-Us). Your job is to do extensive research on the company’s products and then to design a catalog that will persuade customers to buy our product. You will also need to inform customers of the dangers of our waves. Task: You must design a catalog that will persuade the customers of Waves-R-Us to buy your products. Your catalog must have 1 page for each
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Beryllium Atomic Symbol:Be Atomic number:4 Atomic Mass:9.012182 g History Of Beryllium In early Ancient Civilizations‚ the substances of emerald and beryl were first recognized as the same substances. but in late 1798‚ French chemist Louis-Nicholas Vauquelin found out that the unknown element in the two substances was known as beryllium. Beryllium is obtained from the substances beryl and bertrandite by using chemical processes.(1) The first metal form was produced by Wohler and Bussy in 1828.
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of them has only one atom in the outermost shell and they are very reactive when combined with other elements. All elements in column 7A are halogens. Halogens are also highly reactive oxidizing agents that are called “salts”. All halogens have 7 electrons in their outer shells‚ giving them an oxidation number of -1 (Bodner Research Web‚ n.d.). Noble gases can be found in Column 8A. These elements are all considered to belong in this column because they are all gases that are considered unreactive
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Atomic Structure & Electricity 1. Draw an atom with an atomic number of 12. Label the protons‚ neutrons‚ and electrons. Use the periodic table to identify which atom you have drawn. 2. How many valence electrons are present in this atom? 2 3. Would this atom prefer to gain or lose electrons? Why? Lose‚ because the octet rule dictates that if there is less than 4 valance electrons‚ they would prefer to leave the atom. 4. Describe the differences between conductors‚ semiconductors‚ and
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out sound when beaten). Usually solid at room temperature. An exception to this is mercury‚ which is liquid in nature. Examples: Aluminum‚ Gold‚ Copper‚ Silver‚ Sodium‚ Potassium‚ Mercury. Corrode or oxidize in air and sea water. Readily lose electrons. The structure and bonding of metals is also unique. A metallic substance has atoms that are close packed to their neighboring atoms. There are two common arrangements for metals‚ one of which is the body-centered cubic. In this arrangement each
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should be arranged based upon current knowledge of electrons. b. The elements should be arranged based upon the number of neutrons. c. The periodic table should be organized based upon atomic number. d. The periodic table should be organized based upon chemical properties. 2. What is significant about elements in the same group on the periodic table? (3.02) a. They have the same number of protons. b. They have the same number of electrons. c. They have the similar chemical properties. d
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1. Which of the following statements about heat is false? A) If heat flows into a system‚ the extra energy of the system appears in the form of internal energy. B) A hot object possesses more heat than a cold object. C) If the system and surroundings are in thermal equilibrium‚ there is no heat flow between them. D) A process in which heat flows out of a system is said to be exothermic. E) Heat is a form of energy flow. B is false. If you compare a cup of water at 25oC and a bath tub of
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CH 16 - the name of this functional group class is historically derived from the pleasant aromas associated with many of its constituent compounds discovered in past centuries - although not all aromatic compounds known today share the same distinction (many are in fact‚ odorless or even unpleasant)‚ they are the principle components in such pleasant smelling substances as cinnamon‚ licorice‚ wintergreen‚ clove & vanilla CLASSIFICATION – - also known as arenes‚ many aromatic compounds possess
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