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Valence trends on the periodic table. The Rules: Metals can ONLY lose e - = positively charged Nonmetals can gain or lose e - gain = negatively charged lose = positively charged For valences, the metalloids are grouped either With the metals or nonmetals, depending which

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Valence trends on the periodic table.


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slide2

The Rules:

Metals can ONLY lose e- = positively charged

Nonmetals can gain or lose e-

gain = negatively charged

lose = positively charged

For valences, the metalloids are grouped either

With the metals or nonmetals, depending which

Side of the line they are on

slide3

Li = 1s22s1

Li+ = 1s2 = He

Ca = 1s22s22p63s23p64s2

Ca+2 = 1s22s22p63s23p6 = Ar

+1

+2

slide4

+1

+2

+3

+4

+6

+7

slide5

+1

+3

+5

+7

S = 1s22s22p63s23p4

S+4= 1s22s22p63s2

S+6 = 1s22s22p6= Ne

+4

+6

+2

slide6

-4

-3

-2

-1

S = 1s22s22p63s23p4

S-2 = 1s22s22p63s23p6 = Ar