# How does the octet rule relate to the formation of a bond?

Feb 14, 2014

The octet rule causes atoms to form bonds in such a way that they acquire eight valence electrons.

#### Explanation:

Atoms have two ways to achieve an octet. They can either lose electrons or gain electrons.

IONIC BONDS

Atoms in Groups 1 to 3 lose their electrons when they react. This gives them charges of +1, +2, and +3.

Atoms in Groups 15 to 17 gain electrons when they react. This gives them charges of -3, -2, and -1.

These ions then combine to form ionic compounds.

COVALENT BONDS

Elements In groups 14 to 17 can increase the number of electrons in their outer shells to eight by forming covalent bonds.

$\text{Cl}$ (Group 17) makes 1 covalent bond.

$\text{O}$ (Group 16) makes 2 covalent bonds

$\text{N}$ (Group 15) makes 3 covalent bonds

$\text{C}$ (Group 14) makes 4 covalent bonds.