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Question: When hydrogen atom is in its first excited level, it's radius is...

When hydrogen atom is in its first excited level, it's radius is

A

Four times, it ground state radius

B

Twice times, it ground state radius

C

Same times, it ground state radius

D

Half times, it ground state radius.

Answer

Four times, it ground state radius

Explanation

Solution

First excited level means n = 2, r = 0.529 n2Z\frac{n^{2}}{Z}