HW 9-11-08

HW 9-11-08 - Joseph Leonard Green P26 #18-24 9/11/08 18....

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Joseph Leonard Green P26 #18-24 9/11/08 18. Suppose element X is a poor conductor of electricity and breaks when hit with a hammer. Element Z is a good conductor of electricity and heat. In what area of the periodic table does each element most likely belong? X – nonmetal, should be on right side of periodic table Z – metal, should be on the left side of the table 19. Identify each of the following as either a physical change or a chemical change. Explain your answers. a) A piece of wood is sawed in half. b) Milk turns sour. c) Melted butter solidifies in the refrigerator. a) physical change, it doesn’t change the wood’s identity b) chemical change, the milk’s identity is altered c) physical change, it doesn’t change the butter’s identity 20. Use the periodic table to write the names of the elements that have the following symbols, and identify each as a metal, nonmetal, metalloid, or noble gas. a) K
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This note was uploaded on 12/09/2009 for the course CHEM 204 taught by Professor Donnegan during the Spring '08 term at Alabama.

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HW 9-11-08 - Joseph Leonard Green P26 #18-24 9/11/08 18....

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