GENERAL KNOWLEDGE

Detailed explanation-1: -Diatomics on the Periodic Table. The 7 diatomic elements are hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), bromine (Br), and iodine (I). We call them diatomic elements because the atoms appear in pairs.

Detailed explanation-2: -Homonuclear diatomic molecules are molecules made of exactly two identical atoms, and they are relatively simple. 5.2.1: Molecular Orbitals. There are several cases where our more elementary models of bonding (like Lewis Theory and Valence Bond Theory) fail to predict the actual molecular properties and reactivity.

Detailed explanation-3: -Homonuclear diatomic molecules are composed of two atoms of the same element, like in the case of oxygen and nitrogen shown in the illustration here. Heteronuclear diatomic molecules are composed of two atoms of different elements, like in the case of hydrochloric acid and carbon monoxide.