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?
![Which of the following elements has the electronic configuration:1s² 2s² 2p6 3s² 3p¹? [11Na, 13Al, 14N,16S]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "Which of the following elements has the electronic configuration:1s² 2s² 2p6 3s² 3p¹? [11Na, 13Al, 14N,16S]")
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