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Transcript of Nomenclature
Writing & Naming
Formulas Types of Compounds
Inorganic: Formula starts with any element OTHER than C.
Organic:Formula starts with C followed by H and then other elements if present. Inorganic Common
Polyatomic ions 2 Nonmetals Formulas start with H. Second part of formula is:
a polyatomic ion HCl (hydrochloric acid)
HBr (hydrobromic acid
HNO3 (nitric acid)
HNO2 (nitrous acid)
H2SO4 (sulfuric acid)
H2SO3 (sulfurous acid) Always a water solution
or aqueous (aq) Name the metal
then the nonmetal
or polyatomic ion. For transition metals and metals
in Groups 14-16, give oxidation state
as a Roman numeral after the name
and then the nonmetal
or polyatomic ion. NaCl
sodium chloride Ca3(PO4)2
calcium phosphate Name the element with the
lower electronegativity first
then the element with the
higher electronegativity. Use prefixes to tell
how many of atoms
of element is present.
(Mono- for the first
element is understood.) ICl (iodine monochloride)
SO2 (sulfur dioxide)
P2O5 (diphosphorus pentoxide) mono- 1 hexa- 6
di- 2 hepta- 7
tri- 3 octa- 8
tetra- 4 nona- 9
penta- 5 deca- 10 CuSO4
copper(I) sulfate FeS
iron(II) sulfide Fe2S3