The valency of manganese is typically +2 or +3. The chemical formula for the most common compound, manganese oxide, is MnO2.
For example sodium oxalate has the chemical formula Na2C2O4.
The valency of calcium in calcium carbonate is +2, while the valency of carbonate is -2. This results in the chemical formula CaCO3.
I'm betting on hydrogen phosphide (hydrogen which has a valency 1 combines with phosphide which has a valency 3)
The formula for bromide ion is Br-. The valency of bromide ion is -1, as it has gained one electron to achieve a full outer shell of electrons.
The formula for copper(I) nitride is Cu3N. Nitride has a valency of -3
I think the formula of aluminate is AlO2 and valency is 1
For example sodium oxalate has the chemical formula Na2C2O4.
Valency of k=1+ valency so4=2- after crisscrossing the valencies, we get- chemical formula- k2so4
The valency of hydrogen sulfate is -1. It has the chemical formula HSO4-.
The valency of calcium in calcium carbonate is +2, while the valency of carbonate is -2. This results in the chemical formula CaCO3.
I'm betting on hydrogen phosphide (hydrogen which has a valency 1 combines with phosphide which has a valency 3)
The formula Fe3O4 is an empirical formula, and a more nearly structural formula is FeO.Fe2O3, which shows valency 2 in its first part and valency 3 in its second part. Two-thirds of the iron cations have valency 3 and the others valency 2, combined in a single crystal structure.
Zincate ion has the valency of 2 as the formula is [Zn(OH)4]2- or simply ZnO22-.
The formula for bromide ion is Br-. The valency of bromide ion is -1, as it has gained one electron to achieve a full outer shell of electrons.
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Its valency is -2 Its chemical formula is Cr2O7
The formula for copper(I) nitride is Cu3N. Nitride has a valency of -3