Why does a single covalent bond form?

Answer 1

a single covalent bond is where atoms share a single electron

an example of this is water (H2O)

H-O-H

each of the hydrogen atoms is sharing an electron with the oxygen atom

Answer 2

A single covalent bond forms when two atoms share a pair of electrons to achieve a more stable electron configuration. This sharing allows both atoms to fill their outermost energy levels and attain a more stable, lower energy state.

Answer 3

Because the atoms in the compound have a similar tendency.