Question

Give two examples of each of the following-

(a) Monovalent elements

(b) Bivalent elements

(c) Trivalent elements

(d) Tetravalent elements

Answer 1

(a) Monovalent elements - An atom, ion or chemical group with a valence of one, which thus can form one covalent bond is called monovalent.

Examples - Hydrogen(H), Lithium (Li), Sodium(Na)

(b) Bivalent elements - An atom, ion, or chemical group with a valence of two, is called divalent.

Examples- Beryllium(Be), Oxygen(O), Magnesium(Mg), Sulphur(S)

(c) Trivalent elements - An atom, ion or chemical group with a valence of three, is called a trivalent.

Examples- Boron (B), Nitrogen(N), Aluminium(Al), Phosphorous(P)

(d) Tetravalent elements - An atom, ion, or chemical group with a valence of four, is called Tetravalent

Examples- Carbon(C), Silicon (Si), Germanium (Ge)