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Hydrogen & Group 1
X(+)
Group 2
X(2+)
Aluminium
Al(3+)
Ammonium
NH4 (3+)
Hydroxide
OH(-)
Nitrate
NO3 (-)
Hydrogencarbonate
HCO3 (-)
Chlorate
ClO (-)
Sulfate
SO4 (2-)
Carbonate
CO3 (2-)
Phosphate
PO4 (3-)