The group number, number of valence elec...

The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are :

A

16, 5 and 2

B

15, 5 and 3

C

15, 6 and 2

D

16, 6 and 3

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The correct Answer is:

B

Z = 15 (the element is phosphorous) `1s^(2) 2s^(2) 2p^(6) 3s^(2 ) 3p^(3)` Valence electrons =5 : Valency = 3 Group = 15.

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