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Question

Atomic number of nitrogen is 7. What can be inferred from this?



A

Nitrogen will share 3 electrons to form a diatomic molecule.

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B

Nitrogen will form 2 bonds with another nitrogen molecule and attain octet configuration.

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C

Nitrogen will share only 2 electrons to form a diatomic molecule. 

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D

Nitrogen atom doesn't share electron as its octet is complete.

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Solution

The correct option is A

Nitrogen will share 3 electrons to form a diatomic molecule.


Nitrogen has 5 electrons at its outer-most orbit. Thus it will share 3 electrons with another nitrogen atom out of the 5 outer-most electron to attain octet configuration. Thus, both nitrogen atom will share 3 electrons with each other, so total electrons shared are 6. 
Since thus total count of electrons in the outer-most orbit = 6 (Shared electrons) + 2 (Unshared electrons)
Thus nitrogen attains octet configuration, on sharing 3 electrons.
Since one bond is formed by 2 shared electrons, 6 shared electrons form 3 bonds.


Chemistry

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