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Question

In hydrogen atom, the electron is at a distance of 4.768˚A from the nucleus. The angular momentum of the electron is:

A
3h2π
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B
h2π
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C
hπ
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D
3hπ
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Solution

The correct option is A 3h2π
Bohr radius of nth orbit(Rn) = R0n2Z
Where R0=0.529A

For hydrogen, Z=1
GIven , Rn=4.768˚A

4.7680.529=n2

n=3

The angular momentum (mvr) = nh2π3h2π of the electron.

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