The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are:
P Block elements -
P block elements comprise those belonging to group 13 to 18 and together with the S block elements are called the main group elements.Outer most configuration varies from ns2 np1 to ns2np6 in each period.
The element with atomic number is phosphorus.
Thus, its Group number = or VA
valence electrons =
Option (1) is correct
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