Atoms And Nuclei Question 75

Question: When hydrogen atom is in its first excited level, its radius is …. its ground state radius [CBSE PMT 1997]

Options:

A) Half

B) Same

C) Twice

D) Four times

Show Answer

Answer:

Correct Answer: B

Solution:

$ r\propto n^{2} $ . For ground state n=1 and for first excited state n=2.



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