A) \[1{{s}^{1}}\]
B) \[2{{s}^{2}}\]
C) \[2{{s}^{1}}\]
D) \[1{{s}^{2}}\]
Correct Answer: A
Solution :
Deuterium is an isotope of hydrogen. Its atomic number is one. Hence, its electronic configuration is \[{{\,}_{1}}{{D}^{2}}:1{{s}^{1}}\]
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