A) \[3\]
B) \[5\]
C) \[8\]
D) \[9\]
Correct Answer: A
Solution :
Phosphorus (at.\[no.=15\]) Electronic configuration \[=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{3}}\] Number of unpaired electrons =3 \[\overset{3s}{\mathop{}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\overset{3p}{\mathop{}}\,\]
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