If the valence electron of an element has quantum numbers given by, n=4, l=0, m=0, then atomic
number of element would be
(D) 21 or 22
(C) 19 or 20.
(A) 11 or 12. (B) 13 or 14.
Answer is C tell me how
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19 or 20
Explanation:
l = 0 means it's a s subshell
the element must be from s block
n = 4 so it's 4S
As it's valance electron is in 4S it's electronic configuration must be 2,8,8,1 or 2,8,8,2
which refer to element 19 or 20
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