I think the formula of aluminate is AlO2 and valency is 1
Al(OH)4 -1
Formula: AlO2-
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.
The formula for a sulphate ion is SO42- so the valency of a sulphate ion is -2.
The formula for the nitrate ion is NO3- so the valency is -1.
Al(OH)4 -1
Formula: AlO2-
Formula: AlO2-
Formula: AlO2-
NaAlO2
Its valency is -2 Its chemical formula is Cr2O7
The number of electrons needed to lose or gain is its Valency
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.
Valency of k=1+ valency so4=2- after crisscrossing the valencies, we get- chemical formula- k2so4
The formula for a sulphate ion is SO42- so the valency of a sulphate ion is -2.
Zincate ion has the valency of 2 as the formula is [Zn(OH)4]2- or simply ZnO22-.
For example sodium oxalate has the chemical formula Na2C2O4.