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Q.

The valency of nitrogen is:


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a

7

b

3

c

2

d

0 

answer is B.

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Detailed Solution

The valency of nitrogen is 3.
The atomic number of the element nitrogen (N) is 7. Thus, its electronic configuration is 2,5. This means that it can accept three electrons to fill the vacancy to attain a complete octet. Since nitrogen has five electrons in its valence shell, nitrogen has a valency of three. To complete its octet, it can therefore accept three electrons. Thus, nitrogen has a valency of 3.
 
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