20.
Element with electronic configuration 1s2 2s2 2p6 3s2 3p6
3dl0 4s2 4p6 4d10 5s2 5p3 belongs to the following group of
the periodic table
(a) 2nd (b) 5th le) 3rd (d) 7th
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Answer:
your option is wrong right answer is 18th group
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