Q.

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

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a

15, 5, 3

b

16, 5, 2

c

15, 6, 2

d

16, 6, 3

answer is B.

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Detailed Solution

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valence electron
Group number 15, valence electron 5, valency 3

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