Question

A triply ionized Be-atom has the same radius of `2^(nd)` orbitas that of ground state of H-atom.
Th radius of an orbit is `r_n = (r_1 xx n^2)/(1)`.
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false
D. If assertion is false but reason is true.

Answer 1

Correct Answer - A
(a) `r_n = (r_1 xx n^2)/(Z) fo r_(2_(Be^(3+))) = (r_1 xx 2^2)/(4)` and fo r `r_1 H = (r_1 xx 1^2)/(1)`.