Elements for Stoichiometry

• H, Li, Na, K, Ag


  +1
• Zn, Be, Mg, Ca, Sr, Ba


  +2
• B, Al, Ga, In


  +3
• N, P, As, Sb


  -3
• O, S, Se, Te


  -2
• F, Cl, Br, I


  -3
• Ag+, Hg2 2+, and Pb2+ 


  1st Group Cations
• Cd2+, Bi3+, Cu2+ ,As3+, As5+, Sb3+, Sb5+, Sn2+, Sn4+ and Hg2+


  2nd Group Cations
• Zn2+,Ni2+, Co2+, Mn2+, Fe2+, Fe3+, Al3+, and Cr3+


  3rd Group Cation
• Ba2+, Ca2+,and Sr2+


  4th Group Cation
• Mg2+, Li+, Na+, K+ and NH4+


  5th Group Cation
• CO32-, HCO3-,CH3COO-, S2-, SO32-, S2O3 2- and NO2-


  1st Group Anion
• NH3


  Ammonia
• ClO3


  Chlorate
• ClO2


  Chlorite