CARBON AND ITS COMPOUND Carbon is the 4th most abundant substance in universe and 15th most abundant substance in the earth’s crust. The atomic number of carbon is 6. Its electronic configuration is 1s 2 2s 2 2p 6 .its valancy is 4. It requires 4 electrons to achieve the inert gas electronic configuration. But carbon cannot form an ionic bond. It could gain four electrons forming C 4- cation. But it would be difficult for the nucleus with six protons to hold on to ten electrons. It could lose four electrons forming C 4+ Anion. But it requires a large amount of energy to remove four electrons. Thus, carbon overcomes this problem by sharing of its valence electrons with other carbon atoms or with atoms of other elements. Covalent Bond: The bond formed by mutual sharing of electron pairs between two atoms in a molecule is known as Covalent Bond. Types of Covalent Bond: · Single Covalent Bo...