A) \[{{\left( \sigma \,1s \right)}^{2}}\]
B) \[{{\left( \sigma \,1s \right)}^{2}}{{\left( {{\sigma }^{x}}1s \right)}^{2}}\]
C) \[NO\]
D) \[{{\left( \sigma \,1s \right)}^{3}}\]
Correct Answer: C
Solution :
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