Atomic Structure Question 406
Question: The energy of electron in first energy level is - $ 21.79\times {10^{-12}} $ erg per atom. The energy of electron in second energy level is:
Options:
A) $ -54.47\times {10^{-12}}ergato{m^{-1}} $
B) $ -5.447\times {10^{-12}}ergato{m^{-1}} $
C) $ -0.5447\times {10^{-12}}ergato{m^{-1}} $
D) $ -0.05447\times {10^{-12}}ergato{m^{-1}} $
Show Answer
Answer:
Correct Answer: B
Solution:
- If we assume the atom to be hydrogen like, energy of nth energy level $ E_{n}=-\frac{E_1}{E_2} $ where $ E_1 $ is energy of first energy level $ E_2=-\frac{E_1}{2^{2}}=-\frac{E_1}{4}=\frac{-21.79\times {10^{-12}}}{4} $
$ =-5.447\times {10^{-12}} $ erg per atom.
