A. 3
B. 2
C. 4
D. 5
Correct Answer:
Option C – 4
The number of electronic shells contained in an atom with electron configuration 1s² 2s² 2p6 3s² 3p6 4s² is?
![In which of the following transitions is the largest quantum of energy liberated by an hydrogen atom when the electron changes energy levels? [n is the quantum number]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "In which of the following transitions is the largest quantum of energy liberated by an hydrogen atom when the electron changes energy levels? [n is the quantum number]")
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