1. How do we name/write chemical formulas?
Its easy if you follow these rules for these types of molecules.

2. To write Monoatomic, and Polyatomic Ions,
Remember these are the ones that are made up of two different types of atoms.
First, write the symbol for the POSITIVE (+) ion
Secondly, write the symbol for the NEGATIVE (-) ion.
Lastly, add any subscripts that may be needed so that the positive and negative oxidation numbers are equal to zero.
The molecule must be neutral!

3. To name Monoatomic and Polyatomic Ions,
The first atom is said as it appears normally.
NaOH is called Sodium Hydroxide
See how the first name is said as it appears?
The second half of the molecule uses a suffix at the end of it.
Usually an –ide
Ex. Bromide
Br1-
We can use an –ate, or an –ite when the negative ion is Polyatomic!
Ex. Sulfate, or Sulfite (Already on Sheet So Copy Name)
Sulfate is SO43-
Sulfite is SO32-

4. Let’s see if you can name these!
Fe2O3
Iron Oxide
Pb(C2H3O2)2
Lead Acetate
CaSO4
Calcium Sulfate
Al2(SO4)3
Aluminum Sulfate
LiNO3
Lithium Nitrate
H2O2
Hydrogen (per)Oxide

5. What about Covalently bonded molecules?
Naming covalent compounds that are made of two types of elements have their own special naming system.
These are normally called “Binary Systems.”
We use Greek Prefixes to tell the reader how many atoms of each element there are in the molecule.
Mono- means one
Di- means two
Tri- means three
Tetra- means four
Penta- means five
Hexa- means six
Hepta- means seven
Octa- means eight
Nona- means nine

6. Let’s look at some covalently bonded molecules and see how they are named!
Carbon Dioxide CO
Carbon Monoxide
CCl4
Carbon Tetrachloride
H2O
Nope, its not water, it’s
Dihydrogen Oxide