N₂ - CO₂ - +NaCl - +1 for Na; -1 for CH₂S - -2 for H; +2 for K₂S - +1 for K; -2 for CaCO₃ - +2 for Ca; +4 for C; -2 for each O
N₂ -
CO₂ - +
NaCl - +1 for Na; -1 for C
H₂S - -2 for H; +2 for
K₂S - +1 for K; -2 for
CaCO₃ - +2 for Ca; +4 for C; -2 for each O