Chemical Bonding

It allows atoms to have a full valence shell, making them less reactive.

It makes atoms more reactive and changes their properties.

It causes atoms to lose their identity, and become a molecule.

It increases the number of electrons in all atoms.

Cations

Anions

Neutrons

Isotopes

Electrons are transferred from metals to nonmetals.

Both atoms share electrons equally.

A positive ion and a negative ion attract each other.

Metals gain electrons to become cations.

8

7

1

0

+1

-1

0

+2

Potassium forms a cation, Fluorine forms an anion

Potassium forms a anion, Fluorine forms an cation

Both ions have the same charge

The ions attract each other

Group I

Group II

Group V

Group VII

They transfer electrons to each other forming ions.

They share one pair of electrons forming a covalent bond.

They lose electrons to form a metallic bond.

They do not bond with each other.

Atoms form bonds to achieve stability.

Covalent bonds involve sharing electrons.

All atoms want to lose electrons.

Chlorine atoms achieve an octet by sharing electrons.