1. Name one ion for each of the valencies +1, +2 and +3.

2. Name one ion for each of the valencies-1, -2 and -3.

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1 Answers

1. +1 = Sodium Na+

+2 = Calcium Ca+2

+3 = Aluminium Al+3

2. -1 = Chlorine Cl-

-2 = Oxygen O-2

-3 = Nitrogen N-3

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