Question

The formula of the ionic compound that can be formed between the electronic configuration of two elements X and Y are given below X= 1s²2s²2p⁶3s²3p⁶4s² and Y= 1s²2s²2p⁶​

Answer 1

Explanation:

X has a stable electronic configuration, with all the orbitals filled completely. For it to retain that stable configuration, it has to lose 2 electrons from its valence orbital 4s, thus, its valency is 2. While Y has one unpaired electron in 3p orbital which is highly reactive. So, 1 electron from Y contributes to the reaction, thus, valency of Y is 1.

X

2

Y

1

⟹ XY

2

.