Writing Formulas
Hydrocarbons
Check the Prefix and Suffix for the hydrocarbons Methane
the suffix "ane" has the formula Cn H2n +2
add the prefix to the end of H
C1 H2(1) +2
solve and reduce
C1 H4
Ionic Compound
Identify Element Mg(ClO3)-1
Identify polyatomic or nonmetal (ClO3)-1
Find oxidation number Mg+2(ClO3)-1
Criss Cross numbers of oxidation to make subscripts
Reduce to eliminate the 1s
Acids
Ternary(H+polyatomic Ion)
Chloric Acid
Change "ic" to "ate"
Find the symbol Chlorate, attach the hydrogen symbol to the front of the polyatomic compud
HClO3
Binary(Acids H+_)
Hydrosulfuric Acid
Hydro becomes H remove "ic" to get Sulfer (S)
Find the oxidation number H+1S+2
Criss cross H2S1
Reduce H2S
Molecular Compounds
Phosphorus pentachloride
Identify subscript with pretext P1Cl5
Remove 1s PCl5
