A. 1s2,2s2,2p6
B. 1s2,2s2,2p6,3s2
C. 1s2,2s2,2p6,3s1
D. None of these
Submitted by: Naintara Mustafa
Correct Answer: 1s2,2s2,2p6 ✔
Last Updated: September 30, 2020
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