So Many Ways to Name a Compound… Part 1 Part 2 Example Example Name Rule for Name Rule for Formula Formula Name both parts, change nonmetal suffix to Write the symbols of the cation Nonmetal NaCl Sodium chloride Metal (single -ide and anion charge), Determine their charges using ammonium Polyatomic ion Calcium carbonate Name both parts periodic table, roman numerials, or memorized Name both parts, change nonmetal suffix to polyatomic charge) Nonmetal CuS Copper (II) sulfide metal gets its charge in roman –ide, Crisscross charges down to Metal (multi numerals in parentheses after its name subscripts charge), tin, Name both parts, metal gets its charge in Reduce subscripts to lowest lead Polyatomic ion Fe2(SO4)3 Iron (III) sulfate roman numerals in parentheses after its ratio name Name both parts, change second nonmetal’s Write the symbol of each suffix to use Greek prefix system to nonmetal –ide, Nonmetal Nonmetal CO2 Carbon dioxide indicate number of each nonmetal atoms (do Use prefixes to determine not use with first nonmetal) subscripts “mono” + root of nonmetal + acid” “hydro” “ic Nonmetal HCl Hydrochloric acid to watch for: sulfur/phosphor Write H for the hydrogen and then the symbol of the anion Name polyatomic ion, change endings –ate Hydrogen Give hydrogen the subscript to change -ite endings to -ous), –ic, equal to the charge on the anion Polyatomic H2SO4 Sulfuric acid add “acid” (do not write for one) “1” Roots to watch for: sulfur/phosphor
So Many Ways to Name a Compound… Part 1 Part 2 Example Formula Example Name Rule for Name Rule for Formula Metal (single charge), ammonium Nonmetal NaCl Sodium chloride Name both parts, change nonmetal suffix to -ide Write the symbols of the cation and anion Determine their charges using periodic table, roman numerials, or memorized polyatomic charge) Crisscross charges down to subscripts Reduce subscripts to lowest ratio Polyatomic ion Calcium carbonate Name both parts Metal (multi charge), tin, lead Nonmetal CuS Copper (II) sulfide Name both parts, change nonmetal suffix to –ide, metal gets its charge in roman numerals in parentheses after its name Polyatomic ion Fe2(SO4)3 Iron (III) sulfate Name both parts, metal gets its charge in roman numerals in parentheses after its name Nonmetal Nonmetal CO2 Carbon dioxide Name both parts, change second nonmetal’s suffix to –ide, use Greek prefix system to indicate number of each nonmetal atoms (do not use “mono” with first nonmetal) Write the symbol of each nonmetal Use prefixes to determine subscripts Hydrogen Nonmetal HCl Hydrochloric acid “hydro” + root of nonmetal + “ic acid” to watch for: sulfur/phosphor Write H for the hydrogen and then the symbol of the anion Give hydrogen the subscript equal to the charge on the anion (do not write “1” for one) Polyatomic H2SO4 Sulfuric acid Name polyatomic ion, change –ate endings to –ic, change -ite endings to -ous), add “acid” Roots to watch for: sulfur/phosphor