The location of an element in the periodic table reflects
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a
elecrronic configuration
b
quantum numbers of the last orbital being filled
c
Orientation of orbitals of the valence shell
d
none of the above
answer is B.
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Detailed Solution
Example: Na (Z = 11) has electronic configuration 1s22s22p63s1. The last orbital stands as 3s1 which is related to position of sodium in periodic table as: 3rd period, s-block and 1st group.