The speed of electrons in the second orbit of Be3+ ion will... | PHYSICS - MASS ENERGY AND NUCLEAR BINDING ENERGY | SolveeIt | Solveeit

Today, August 19

Question

The speed of electrons in the second orbit of Be³⁺ ion will be-

A

$\frac{c}{137}$

B

$\frac{2c}{137}$

C

$\frac{3c}{137}$

D

$\frac{4c}{137}$

Answer

$\frac{2c}{137}$

Explanation

Solution

V= $\frac{c}{137} \cdot \frac{Z}{n} = \frac{c}{137} \cdot \frac{4}{2} = \frac{2c}{137}$