Give the formula and valency of : aluminate;chromate;cupric;argentic;nickel;zincate;ferrocyanide;Borate; Stannous; Dichromate
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AlO2 and valency is 1
CrO4 and valency is -2
Cu and valency is 3
Ag and valency is 2
Ni and valency is 2
ZnO2 and valency is -2
[Fe(CN)] and valency is -4
BO3 and valency is -3
Sn and valency is 2
Cr2O7 and valency is -2
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