# The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are: Option 1) $15,5$ and $3$ Option 2) $16,6$ and $3$ Option 3) $16,5$ and $2$ Option 4) $15,6$ and $2$

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.

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The element with atomic number is phosphorus.

$P=1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$

Thus, its Group number =$15$ or VA

valence electrons = $5$

valency = $3$

$\therefore$ Option (1) is correct

Option 1)

$15,5$ and $3$

Option 2)

$16,6$ and $3$

Option 3)

$16,5$ and $2$

Option 4)

$15,6$ and $2$

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