Explanation

A bond in which adjacent atoms share a pair of electrons with antiparallel spin. covalent bond has saturation and directivity. The former means that the number of bonds formed by atoms bound by covalent bond has a maximum (equal to the number of unpaired valence electrons); The latter refers to the definite orientation between covalent bond. Many non-metallic simple molecules (such as H2, N2, O2, etc.) form nonpolar covalent bond between two atoms. Molecules are nonpolar molecules. The other is non-metallic atomic crystal or covalent crystal. For example, diamond is composed of carbon. Each carbon atom forms covalent bond with four adjacent carbons, and the bond angle is 109 ° 28

Classification