Chapter one - Chapter 1-Chemical Properties of the Elements...

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8/25/10 Chapter 1 -Chemical Properties of the Elements 1A: Alkali Metals Very reactive, not as reactive as you go down 2A: Alkaline Earth Metals Ex: Magnesium, in flash grenades, reacts with oxygen 7A: Halogens Ex: Chlorine, Iodine. Reacts to form strong acids React with hydrogen to form strong acids Also exist as diatomic (2) molecules. (when alone) Iodine goes from solid to gas (skips turning to liquid) 8A: Noble Gases Very stable (noble in behavior) Very un-reactive Metals on left, non metals on right Hydrogen non metal on left side, but can act as a metal or non metal If H in front: metal (HCL) If H in back: non metal (LiH) Properties of metals: -look metallic (shiny) -high melting points, high amount of heat to melt -malleable, can hammer them into shapes -ductile, stretch out into thin wires -good conductors of electricity Non metal properties -don’t look metallic (dull) -low melting points -nonmalleable -not ductile -not good conductors of electricity Semi Metals -may have qualities of metals and non metals.
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