Question

23. Why does an atom of an element react with another atom to form a
molecule?
?​

Answer 1

However, since not all elements have enough electrons to fill their outermost shells, atoms form chemical bonds with other atoms thereby obtaining the electrons they need to attain a stable electron configuration. When two or more atoms chemically bond with each other, the resultant chemical structure is a molecule.

Answer 2

Explanation:

To complete it's octet and achieve the stable nobel gas configuration by either gaining, losing or sharing electrons and forming ionic or covalent bonds.