Question

give reason for the formation of single covalent bond between two chlorine atoms and the double covalent bond between two oxygen atoms during formation of a covalent chlorine molecule and formation of a covalent oxygen molecule respectively

Answer 1

cl valency electrons is 1,so it combines with other to form single c.b.but oxygen has 2 valency electrons,so it form double c.b

Answer 2

Answer:

Explanation:,

Chlorine molecule is formed by sharing one pair of electrons between two reacting chlorine atoms, so that each atom attain stable electronic configuration of the nearest noble gas - helium, thus each chlorine atoms ,contributes one electron leading to covalent bonding and formation of single covalent bond

While in oxygen two pairs of electrons are shared between two reacting oxygen atoms so that each atoms attain stable electronic configuration to nearest noble gas -neon and formation of of covalent bonding and double covalent bond