Oct.7--Writing and Naming Ionic and Covalent Compounds

Ionic Compounds

- composed of 2 or more ions

- held together by electrostatic forces

- metal transfers electrons to non metal

Ex. Ca (2+) & O (2-)

   +2 + (-2) = 0

        CaO

     Calcium Oxide (always metal first!)

Ex. metals that have 2 or more charges

   Manganese (II) Chloride

    +2 + (-1) 2 = 0

     MnCl₂

Ex. Complex Ions: a group of atoms that behave as one atom

Calcium Hydroxide

+2 + (-1)2 = 0

     Ca(OH)₂

Covalent Compounds

-share electrons

- non metal & non metal

- Diatomic Molecules: N₂, O₂, F₂, Cl₂, Br₂, I₂, H₂

- use Greek prefixes to indicate the number of atoms

Ex. CO₂ = Carbon Dioxide

   N₂O₄ = Dinitrogen Tetroxide

Greek prefixes to indicate the number of atoms
Mono-	1
Di-	2
Tri-	3
Tetra-	4
Penta-	5
Hexa-	6
Hepta-	7
Octa-	8
Nona-	9
Deca-	10