1. Naming Molecules and Writing Molecular Formulas

2. Naming Binary Molecular Compounds
prefixes tell how many atoms of each element are present
still end with -ide
vowel of the prefix is often dropped
omit prefix mono- for the first element

3. Greek numerical prefixes.
First to name covalent compounds we need to know some Greek numerical prefixes.  It'd be a good idea to memorize these since they will be useful in many other classes.
Greek numerical prefixes. 
Number
Prefix 1
-mono 2
-di 3
-tri 4
-tetra 5
-penta 6
-hexa 7
-hepta 8
-octa 9
-nona 10
-deca

4. Writing formulas for binary molecular compounds
write the symbol and use prefixes of each element in order write subscripts for that element
carbon monoxide → CO
nitrogen triiodide → NI3

5. Naming and Writing Formulas for Acids

7. acids produce hydrogen ions (H+) when dissolved in water naming
ends in –ide → acid begins with hydro- and ends with –ic
H2S would normally be dihydrogen sulfide
→ acid name is hydrosulfuric acid

8. ends in –ite → only say the anion and it ends in –ous
HNO2 would normally be hydrogen nitrate
→ acid name is nitric acid
ends in –ate → only say the anion and it ends in –ic
HMnO4 would normally be hydrogen permanganate
→ acid name is permanganic acid

9. Writing formulas for acids
reverse the rules for writing names of acids (remember, acids start with hydrogen even if not in the name)
hydrobromic acid → must be hydrogen ion (H1+) and a bromide ion (Br1-). Therefore, is HBr
phosphorous acid → must be hydrogen (H) and phosphite (PO3)3-. Therefore, is H3PO3

10. Naming and Writing Formulas for Bases
an ionic compound that produces hydroxide ions (OH-) when dissolved in water
Naming
bases are ionic compounds so name like any other ionic compound– just say it!
NaOH is sodium hydroxide
KOH is potassium hydroxide
Formulas
find ionic charges and criss-cross them
aluminum hydroxide contains the ions Al3+ and OH1- and therefore Al(OH)3