Question

Plz answer only q.17

Answer 1

Explanation:

they belong to period 3 .They form elctrovalent bond. Chemical formula is Mg, S. Compound is MgS

Answer 2

Explanation:

1 . both X and Y belong 3rd period because both have three shells.

2. Ionic bond will be formed

3. chemical formula XY.

(MgS)

x is magnesium and Y is sulphur