INFORMATION:
We have a covalent bond, and we must determine what happens.
STEP BY STEP EXPLANATION:
To determine what happens, we need to know that:
This type of chemical bond is called a covalent bond. A covalent bond is a bond in which two atoms share one or more pairs of electrons.
Separating any pair of bonded atoms requires energy; the stronger a bond, the greater the energy required to break it.
Breaking a bond always requires energy to be added to the molecule. Consequently, forming a bond always releases energy.
Then, when two atoms form a covalent bond, energy is released.
ANSWER:
A. Energy is released.