Question

The moment of momentum for an electron in second orbit of hydrogen atom as per Bohr’s model is

• A. $\frac{h}{\pi}$
• B. $2\pi h$
• C. $\frac{2h}{\pi}$
• D. $\frac{\pi}{h}$

Answer 1

Answer: (A)

$\frac{h}{\pi}$

Answer 2

According to Bohr’ second postulate

Angular momentum $L = \frac{nh}{2\pi}$

Angular momentum is also called a moment of momentum

For second orbit, n =2

$L = \frac{2h}{2\pi} = \frac{h}{\pi}$