Question

How many electrons a carbon atom share with other carbon atoms in formation of acetylene molecule?

Answer 1

Each carbon atom in ethane forms four single bonds, one to each of three hydrogen atoms and one to the neighboring carbon atom. However, in some organic molecules, a carbon atom shares two or three pairs of electrons with another bonded atom. if two electrons pairs are shared, a double bond exists.

Answer 2

a carbon shares it's 4 electrons with acetylene molecule as the acetylene molecule has no octet configuration so it's needs more four electrons