Question

size of na^+ is same as that of a) ne atom b) na atom c) k atom d) none of these​

Answer 1

Answer:

option b) na atom is the correct answer

Answer 2

Answer:

a) ne atom

Explanation:

Na+ has 10 electrons as it has given off an electron to form a cation.

• Electronic configuration before ionisation= (2,8,1)
• Electronic configuration after ionisation= (2,8)

Neon belongs to group 18, period 3

It has 2 completely filled outer shells

Its electronic configuration= (2,8)

Hence size of Na+ ion is same as Ne atom as its electronic configuration is the same.