Question

what did tetravalency

Answer 1

A carbon atom completes its octet only by sharing its valence electrons with other atoms. As a result, carbon atom forms four covalent bonds by sharing valence electrons with other atoms. This is known as tetravalencyof carbon,(tetra means four).

Answer 2

carbon atom have atomic number 6

and 4 electron which make four covalent bond by sharing of valance electron. with other atom this is know as tetravalency .