Which combination forms a covalent bond?

OA. A fluoride ion and a chloride ion

OB. A potassium atom and a sodium atom

OC. A carbon atom and a hydrogen atom

OD. A sodium ion and a chloride ion

Answer: Option C) A carbon atom and a hydrogen atom

Explanation:

A covalent bond is formed between two elements with close electronegative value. In essence, carbon and hydrogen has almost the same power to attract electrons, thus both elements combine to form a compound with covalent bond.

For example: methane (CH4), has one carbon atom linked by covalent bonds to four hydrogen atoms