Q.
An atom X belongs to 4th period of the periodic table and has highest number of unpaired electrons in comparison to the other elements of the period. The atomic number of X is
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a
23
b
25
c
24
d
33
answer is C.
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Detailed Solution
The configuration of atom of 4th period with maximum unpaired electrons is 1 s22 s22p63 s23p63 d54 s1.Hence its atomic number is 24 .
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