The radius of which of the following orbit is same

By Rebecca
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The radius of which of the following orbit is same as that of the first Bohr’s orbit of a hydrogen atom?

A) Li 2+ (n=2)

B) Li 2+ (n=3)

C) Be 3+ (n=2)

D) He + (n=2)

Answer:

C) Be 3+ (n=2)

Explanation:

For ,

For ,

For ,
For ,

This has the same radius as that of the first Bohr’s orbit of the atom.

The radius of which of the following orbit is same

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