Which scenario would cause a covalent bond to form?

A. Two atoms share electrons so they can fill their outer shells
B. The constant motion of electrons and the creation of charge imbalances bonds two molecules together
C. A hydrogen atom with a slight positive charge is attracted to a negative charge of another molecule or atom
D. One atom loses one or more electrons and the other atom gains one or more electrons

Correct Answer:

Option A – Two atoms share electrons so they can fill their outer shells

Explanation

Covalent bonds form so that atoms can become more stable. They do this by sharing electrons, rather than fully gaining or losing them.