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What is the de Broglie wavelength of el...

What is the de Broglie wavelength of electron , in hydrogen atom , moving in an orbit having maximum magnetic quantum no. `+2`?

A

`9.97 "Å"`

B

`2.8 "Å"`

C

`6.12 "Å"`

D

`3.32"Å"`

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The correct Answer is:
A
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