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The Periodic Table.

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Presentation on theme: "The Periodic Table."— Presentation transcript:

1 The Periodic Table

2 The Modern Periodic Table
Arranged in order of increasing atomic number

3 Properties of Elements
Metals Metalloids Nonmetals

4 Metals – MOST of the Periodic Table
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 Nonmetals – upper right corner
Variation in properties Not metals Mostly gases at room temperature Generally, poor conductors Solids tend to be brittle

6 Metalloids – the “stairstep”
Properties similar to metals and nonmetals Behavior (metal or nonmetal) depends on conditions

7 Periodic Law 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 Group 1A: Alkali Metals Most reactive metals: 1 VALENCE ELECTRON

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

10 Group 7A: Halogens Most reactive nonmetals: 7 valence electrons

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

12 B-Groups: Transition Metals

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