Question

Considering Bohr's atomic model to be true if the atomic number is doubled then which of the options are correct.

• A. Energy is doubled
• B. Radius is doubled
• C. Velocity is doubled
• D. Radius is halved

Answer 1

Answer: (C), (D)

The correct options are
C Velocity is doubled
D Radius is halved

$E_n=-13.6\times \frac{Z^2}{n^2}$
So if Z is doubled E will become four times
$R_n=\frac{n^{2}a}{Z}$
So if Z is doubled then R will be halved. $V_n=\frac{Z}{n}{V}_0;$ where $v_0=2.19\times {10}^{6}m/s.$ if Z is doubled then yes v will be doubled.