Hydroxide
OH -1
Hydrogen Sulfate
HSO4 charge -1
Nitrite
NO2 charge -1
Silver
Ag charge +1
Zince
Zn+2
Mercury or Dimercury
Hg2 charge 2
Ammonium
NH4 charge +1
Nitrate
NO3 charge -1
Sulfite
SO3 charge -2
Sulfate
SO4 charge -2