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 $



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