The chemical formula for zinc iodide is ZnI2. This is because zinc has a 2+ charge (Zn2+) and iodine has a 1- charge (I-), so you need two iodine ions to balance out the charge on one zinc ion.
The chemical formula for beryllium sulfide is BeS.
The number representing the charge in an ion is not written in subscript in a chemical formula.
The chemical formula i2Ca is incorrect because the element symbol "i" is not recognized in the periodic table. The correct chemical formula for calcium iodide is CaI2, where calcium has a +2 charge and iodine has a -1 charge.
The chemical formula for copper(I) bromide is CuBr. It is a compound that contains one copper ion with a +1 charge and one bromide ion with a -1 charge.
The chemical formula for zinc iodide is ZnI2. This is because zinc has a 2+ charge (Zn2+) and iodine has a 1- charge (I-), so you need two iodine ions to balance out the charge on one zinc ion.
The chemical formula for escalene is C2H3O6N. It has a charge of zero because it is a neutral compound.
The formula for carbonate ion is CO3^2-, with a charge of -2. The formula for magnesium ion is Mg^2+, with a charge of +2.
It's CsI, because cesium has a +1 charge and iodine has a -1 charge
the chemical formula of zinc sulphate is ZnSO4.
The chemical formula for beryllium sulfide is BeS.
The chemical formula for peroxide is O2 and the charge is 2-
The number representing the charge in an ion is not written in subscript in a chemical formula.
The chemical formula for lithium arsenide is Li3As.
CrO4-2
The chemical formula for sulfate is SO4^2- (sulfur with four oxygen atoms and a charge of 2-).
The chemical formula for a lithium ion is Li+, while the chemical formula for a chloride ion is Cl-.