What are the two properties of carbon which lead to the huge numberof carbon compounds we see around us

The two properties of carbon that lead to the huge number of carbon compounds we see around us are:

1. Catenation: This is the ability of carbon atoms to form long chains, or rings, by linking with other carbon atoms. This property is due to the small size of the carbon atom, which allows it to form strong covalent bonds with other carbon atoms. This leads to the formation of large molecules, and hence, a variety of carbon compounds.

2. Tetravalency: Carbon has four electrons in its outermost shell and needs eight electrons for stability. This means it can form four covalent bonds with other atoms. This property allows carbon to combine with other elements such as hydrogen, oxygen, nitrogen, sulfur, and phosphorus, leading to a vast number of compounds.