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Question

Chemistry Question on Structure of atom

According to Bohr?? theory, the angular momentum of an electron in 5th orbit is :

A

25hπ25 \frac{h}{\pi}

B

1.0hπ1.0 \frac{h}{\pi}

C

10hπ10 \frac{h}{\pi}

D

2.5hπ2.5\frac{h}{\pi}

Answer

2.5hπ2.5\frac{h}{\pi}

Explanation

Solution

Angular momentum of an electron =mvr=nh2π= mvr = \frac{nh}{2\pi} (n is orbit number) in 5th orbit =5h2π= \frac{5h}{2\pi} =2.5 hπ= \frac{2.5 \,h}{\pi}