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By Henderson W. E.

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11. List the properties common to metals, and compare them to the properties of non-metals. 12. 3 instead of 24 or 25. 13. Indicate whether the following properties increase or decrease from left to right across the periodic table. Account for the trend using the atomic model. a) atomic radius (excluding noble gases) b) metallic character c) first ionization energy d) electron affinity e) electronegativity 14. Indicate whether the following properties increase or decrease as you descend a group in the periodic table: a) ionic radius b) first ionization energy c) electron affinity d) electronegativity 15.

This is a good rule to follow when drawing Lewis structures of compounds. However, you will learn that other compounds can exist in which an atom can have less than 8 or more than 8 outer electrons. CHAPTER 2 Chemical Compounds and Bonding 35 Contents Previous Section Next Section Quit Decision-Making Skills Case Defining the Issue Developing Assessment Criteria Study Can an Element Save Lives? ̈ Researching the Issue ̈ Analyzing Data and Information ̈ Proposing a Course of Action ̈ Justifying the Course of Action ̈ Communicating Your Proposal B A C K G R O U N D I N F O R M AT I O N Every chemical element is unique, and almost every element touches your life in one way or another.

The due to formation of a compound is driven by the need to copyright attain the lowest energy state, and the transfer of restrictions. electrons from metal to non-metal does exactly that. When atoms combine and form ions, ionic compounds are formed. An ionic compound is a substance that consists of positive ions and negative ions held together by electrostatic attractive forces. 7 If a positively charged forms an ionic bond. sphere and a negatively charged The formation of the ionic compound sodium chloride from atoms of sphere are brought near each other, sodium and chlorine can be depicted as follows: Na ϩ Cl Na ϩ Cl Ϫ the electrostatic attraction brings the opposite charges together.

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A Course in Inorganic Preparations by Henderson W. E.

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