Electron Sharing
just as you and your friend can buy apples by sharing money, atoms can become more stable by sharing valence electrons. A chemical bond formed when two atoms share electrons is called a covalent bond.
Unlike ionic bonds, which form between metals and nonmetals, covalent bonds often form between two or more nonmetals. Oxygen, carbon, nitrogen, and the halogens are examples of atoms that frequently bond to other nonmetals by sharing electrons.
The element fluorine forms molecules made of two fluorine atoms. Each fluorine atom shares one of its seven valence electrons with the other atom. When you count the number of electrons on one atom, you count the shared pair each time. By sharing, both atoms have eight valence electrons. In a covalent bond, both atoms attract the two shared electrons at the same time.
Covalent Bonds

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Electron Sharing:
Just as you and your friend can buy apples by sharing money, atoms can become more stable by sharing valence . A bond formed when two atoms share is called a bond.

Unlike bonds, which form between metals and nonmetals, bonds often form between two or more . Oxygen, carbon, nitrogen, and the halogens are examples of atoms that frequently bond to other nonmetals by sharing .

The element fluorine forms made of two fluorine atoms. Each fluorine atom shares one of its seven valence with the other atom. When you count the number of on one atom, you count the shared pair each time. By sharing, both atoms have eight valence . In a bond, both atoms attract the two shared at the same time.