Question

3. Some elements and their valencies are given.
Elements
Valency
Ba
2
Cl
1
Zn
2
O
2
a) Write the chemical formula of barium chloride
b) Write the chemical formula of zinc oxide.
c) The chemical formula of calcium oxide is CaO. What is
the valency of calcium?​

Answer 1

Explanation:

a)Bacl2

b)zno

c)calcium oxide

valency of calcium is 2

Answer 2

Answer:

a) BaCl2

b) ZnO

c) Valency of Ca = +2