Atoms, Elements, & Compounds

Atoms & ElementsAn atom is the basic unit of

matter (make up elements) If you break it any smaller it is no

longer the elementAtoms are made up of smaller

pieces called protons, electrons, and neutrons

Elements are made entirely of the same type of atom

BondingWhen two or more atoms are

joined together they form a bond

There are two types of bonds between atoms, ionic and covalent

Molecules & SaltsTwo or more atoms joined

together form a compoundThe two main types of

compounds are molecules and salts Molecules are formed from covalent

bonds (shared electrons) Salts are formed from ionic bonds

(taken electrons)

Hydrogen BondingA third type of bonding, called

hydrogen bonding, occurs between certain molecules

Very present in water