WRITE THIS ON THE BACK OF YOUR WORKSHEET
Directions: Name these compounds. List if they are either
ionic or covalent.
1. PBr3
2. Na2SO4
3. CF4
Directions: Write the formula for the following compounds.
1. carbon monoxide
2. sulfur dichloride
3. diboron dihydride
Naming Compounds
as
Ionic
or
Covalent
Ionic and Covalent Bonding
 If a compound is made from a metal and a
nonmetal, its bonding will be ionic.
 If a compound is made from two
nonmetals, its bonding will be covalent.
Naming of the bonds....
 For ionic compounds, write positive ion
first, followed then write the negative ion.
CATION – metal, always positive, goes first
ANION – nonmetal, always negative, goes
second
Suffixes
 Rule 1 – If a single element, compound
ends in "IDE."
 Rule 2 – If a polyatomic, compound ends
in "ATE" or "ITE."
Numerical Prefixes
 Remember: you only use prefixes for
covalent compounds!
1- mono 6- hexa
2- di
7- hepta
3- tri
8- octa
4- tetra
9- nona
5- penta 10- deca
Examples:
P2S3- diphosphorus trisulfide
A.) Phosphorus (non metal)
B.) Sulfur (non metal)
C.) Covalent Bond
D.) Prefix (covalent only) –
use “di” which means 2
Use “tri” which means 3
E.) Suffix – use “ide” with sulfur (because it is a single
element)
Examples:
CaCO3– Calcium Carbonate
A.) Calcium – metal, do not use a prefix because it is an
ionic bond.
B.) Carbonate is Carbon and Oxygen bonded together.
They are both non metals and are a polyatomic
bond.
C.) Ionic Compound
D.) Suffix - use “ate” because of the
polyatomic bond.
Directions: Name these compounds. List if they are either ionic
or covalent.
 PBr3 – P (phosphorus) + Br (bromine)
 This is a Covalent (2 nonmetals)
 Phosphorus tribromide
Na2SO4 –
 Sodium Sulfate




Na – Sodium, metal, 2 atoms of sodium
S – Sulfur, nonmetal, 1 atom of sulfur
O – Oxygen, nonmetal, 4 atoms of oxygen
“ATE” – suffix use this suffix because it is a polyatomic
3. CF4
Directions: Write the formula for the
following compounds.
1. carbon monoxide - CO
2. sulfur dichloride - SCl2
3. diboron dihydride - B2H2