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.
