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PowerPoint from 10/27 Fill in the information on your worksheets for this page using the following PowerPoint. Honestly, this should be an easy assignment. You are getting points for copying down the information.

Groups Groups: or Family = columns Share similar properties Numbers on top indicate what group it is Noble gases-Group 18 (or 8A) Halogens-Group 17 (or 7A) Alkali metals-Group 1

Periods Periods = rows Atomic mass increases from left to right Number of protons increases from left to right Number of electrons in the outer shell of the atom increases from left to right Only hydrogen and helium are in the 1 st period

Look at L14 –15 or L186 – L187

Properties of Metals Physical PropertiesChemical Properties Show Luster (shininess) Good conductors of heat and electricity High density High melting point Ductile (drawn into wires) Malleable (hammered into thin sheets) Easily lose their electrons Corrode easily: a gradual wearing away Examples of corrosion: Silver tarnishing rusting Some react with air, water, and acids

Properties of Nonmetals Physical PropertiesChemical Properties No Luster (dull appearance) Poor conductors of heat and electricity Low density Low melting Not Ductile Not Malleable Brittle - solids break easily Gain or share their Electrons React with metals to form compounds Bond with other non metals

Properties of Metalloids Have Properties of both metals and nonmetals Physical Properties Can be shiny or dull Semi- conductors for electricity Solids Brittle Bonds to form glass Form alloys with metals Chemical Properties