Question

When an element such as phosphorus forms an ionic bond, its valence shell would have

A. 18 electrons

B. 0 electrons

C. 8 electrons

D. 5 electrons

Answer 1

Valence shell :- It is the outer most shell which contains electrons.

The valence shell of Phosphorus contains initially 5 electrons

thus the valence shell has 5 electrons.

Now,

when phosphorus forms an ionic bond then it will be the acceptor and usually take 3 electron and make 8 electrons in its outer most shell which is most stable state for exmaple

Phosphine PH₃

Hence

When phosphorus forms ionic bond then its valence shell has 8 electrons.

thsu

option -A is correct answer.