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Arranged in order of increasing atomic number Metals MetalloidsNonmetals.

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Presentation on theme: "Arranged in order of increasing atomic number Metals MetalloidsNonmetals."— Presentation transcript:

1

2 Arranged in order of increasing atomic number

3 Metals MetalloidsNonmetals

4 Good conductors of heat and electric current High luster or sheen (shiny) Solids at room temperature (except for Hg) Ductile Malleable MORE REACTIVE ON LEFT

5 Variation in properties Not metals Mostly gases at room temperature Generally, poor conductors Solids tend to be brittle

6 Properties similar to metals and nonmetals Behavior (metal or nonmetal) depends on conditions

7 When arranged in order of increasing atomic #, elements show similar properties within groups (this has to do with their electron configurations). Group = column Period = row

8 Most reactive metals: 1 VALENCE ELECTRON Alkali Metals

9 Less reactive than Group 1A metals: 2 valence electrons Alkaline Earth Metals

10 Most reactive nonmetals: 7 valence electrons Halogens

11 “Inert Gases:” 8 valence electrons (except for He – 2) Rarely react because highest energy level is FULL. Noble Gases

12 Transition metals transition metals


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