NH3 :N- -3; H- +1
N2H4 : N- -2;H- +1
N2: N - 0
N2O: N- +1; O- -2
NO: N- +2; O- -2
N2O5: N- +5; O- -2
Na2S2O3: Na- +1; S- +2; O- -2
KMnO4: K- +1 ;Mn- +7 ; O- -2
K2MnO4: K- +1; MN- +6; O- -2
MnO2: Mn- +4; O- -2
KClO3: K- +1; Cl- +5; O- -2
CH3COOH: С- -3; H- +1; C- +3; O- -2; O- -2; H- +1.