A) \[12,\,\,13\]
B) \[13,\,\,14\]
C) \[10,\,\,11\]
D) \[11,\,\,12\]
Correct Answer: D
Solution :
\[n=3,\,\,l=0\]and \[m=0\] indicates \[n=3\to \]present in the third shell (\[M-\]shell) \[l=0\to \]present in the 3s sub shell (since for \[s,l=0\]) \[m=0\to \]resent in the 3s sub shell (may be\[3{{s}^{1}}\]or\[3{{s}^{2}}\])hence its electronic configuration \[1{{s}^{2}},\,\,2{{s}^{2}},\,\,2{{p}^{6}},\,\,3{{s}^{1\,\,or\,\,2}}\] \[\therefore \]the atomic number\[=11or12\]
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