Question

Which one of the following depict the correct representation of atomic radius(r) of an atom?

(i)	(ii)
(iii)	(iv)

Options

• (i) and (ii)

• (ii) and (iii)

• (iii) and (iv)

• (i) and (iv)

Answer 1

(ii) and (iii)

Explanation - 

The atomic radius(r) of an atom is the distance between the centre of the nucleus and the outermost shell of an isolated atom. In representation (ii), the outermost shell is K and atomic radius is correctly depicted from centre of nucleus to shell K while in representation (iii), the outermost shell is M and atomic radius is correctly depicted from centre of nucleus to shell M.