Atomic Structure Question 125
Question: The Bohr orbit radius for the hydrogen atom $ (n=1) $ is approximately $ 0.530{\AA} $ . The radius for the first excited state $ (n=2) $ orbit is [CBSE PMT 1998; BHU 1999]
Options:
A) $ 0.13{\AA} $
B) $ 1.06{\AA} $
C) $ 4.77{\AA} $
D) $ 2.12{\AA} $
Show Answer
Answer:
Correct Answer: D
Solution:
$ {I^{st}} $ excited state means $ n=2 $
$ r=r_0\times 2^{2} $
$ =0.53\times 4 $
$ =2.12,\text{{ }AA} $
