NAMING MONATOMIC ANIONS: Nonmetal atoms gain valence electrons to form called negatively charged ions anions. When a nonmetal forms an ion, it is named: Element stem name + + ion “ide” e.g. O = oxygen atom = oxide ion → O-2 N = nitrogen atom N-3 = nitride ion → Name each of the following monatomic anions: F- = _________________________________ Cl- = ____________________________ Br- = ________________________________ S-2 = ____________________________ I- = _________________________________ P-3 = ____________________________ NAMING POLYATOMIC IONS: Ions made up of more than one atom are polyatomic ions: --only one polyatomic cation: NH4+ = ammonium ion __many polyatomic anions: see table Polyatomic Ions NH4+ OH- = hydroxide ion NO2- = nitrite ion C2H3O2- = acetate ion CN- = cyanide ion NO3- = nitrate ion PO4-3 = phosphate ion CrO4-2= chromate ion SO4-2 sulfate ion MnO4-= permanganate ion Cr2O7-2= dichromate ion SO3-2 = sulfate ion CO3-2 = carbonate ion HCO3- = hydrogen carbonate ion or bicarbonate ion
NAMING MONATOMIC ANIONS: Nonmetal atoms gain valence electrons to form negatively charged ions called anions. When a nonmetal forms an ion, it is named: Element stem name + “ide” + ion e.g. O = oxygen atom → O-2 = oxide ion N = nitrogen atom → N-3 = nitride ion Name each of the following monatomic anions: F- = _________________________________ Cl- = ____________________________ Br- = ________________________________ S-2 = ____________________________ I- = _________________________________ P-3 = ____________________________ NAMING POLYATOMIC IONS: Ions made up of more than one atom are polyatomic ions: --only one polyatomic cation: NH4+ = ammonium ion __many polyatomic anions: see table NH4+ Polyatomic Ions OH- = hydroxide ion NO2- = nitrite ion C2H3O2- = acetate ion CN- = cyanide ion NO3- = nitrate ion PO4-3 = phosphate ion CrO4-2= chromate ion SO4-2 sulfate ion MnO4-= permanganate ion Cr2O7-2= dichromate ion SO3-2 = sulfate ion CO3-2 = carbonate ion HCO3- = hydrogen carbonate ion or bicarbonate ion
3_-_ph_ch_changes_chemreactions___balancing_unit_3_-_phc.docx