Question

define the term tetravalency

Answer 1

Carbon has 4 valence electrons in its outermost shell. That is why, Carbon is known to have tetra valence or four valence electrons.......

Answer 2

Tetravalency means that if an atom has four electron left to share and to form a compound then that element is said to be tetravalent
Carbon is a tetravalent element and shows tetravalency