Question

define valency by taking examples of nitrogen and boron​

Answer 1

Answer:

Atomic number of nitrogen is 7. Hence its electronic configuration is 2, 5. Hence to complete its octet it will take three electrons (5 + 3 = 8)...Atomic number of boron is 5. Hence its electronic configuration is 2,3. Hence to complete its octet it will give three electrons Therefore its valency is 3 and positive...

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Answer 2

Valency is the combining capacity of an atom or radical.

Examples -

• Valency Of Nitrogen : (- 3)

Since it has five electrons in its valance shell, it takes three more to become stable.

• Valency of Boron : (+3)

Since it has three electrons in its valance shell, it donates them and becomes stable.

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