Compound Formulas Help Needed !?

Question

Write the compound formulas for each of the following pairs and the name of the compound formed when the elements or radicals combine.

a) Mg^+2 + OH^-1

b) K^+1 + PO_4^-3

c) Cu^+2 + S^-2

d) N^+5 + O^-2

Answer 1

a) Mg(OH)2 Magnesium Hydroxide

b) K3PO4 Potassium Phosphate

c) CuS Copper Sulphide

d) N2O5 Nitrogen Pentoxide