Atoms And Nuclei Question 84
Question: The energy required to excite an electron from the ground state of hydrogen atom to the first excited state, is [Pb. PMT 1999]
Options:
A) $ 1.602\times {{10}^{-14}},J $
B) $ 1.619\times {{10}^{-16}},J $
C) $ 1.632\times {{10}^{-18}}J $
D) $ 1.656\times {{10}^{-20}}J $
Show Answer
Answer:
Correct Answer: C
Solution:
Energy to excite the $ {{e}^{-}} $ from $ n=1 $ to $ n=2 $ $ E=-3.4-(-13.6)=10.2,eV=10.2\times 1.6\times {{10}^{-19}} $ $ =1.632\times {{10}^{-18}},J $
