Question

why does boron have - 3 and +3 valency I understood abt the +3 but wb the - 3, pls explain ​properly​

Answer 1

Answer:

The valency of boron is 3. That means it can gain, lose and share three electrons. It has a valency of -3, which it can give three electrons. After boron gives three electrons, it's octet is complete. That's why it has a valency of 3.

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