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elements, polyatomic ions
Zinc
Zn +2
Chlorine
Cl -1
Calcium
Ca +2
Magnesium
Mg +2
Sulfur
S -2
Aluminium
Al +3
Copper
Cu +1;+2
Oxygen
O -2
Iodine
I -1
Hydrogen
H -1/+1
Fluorine
F -1
Lithium
Li +1
Phosphorous
P -3
Sodium
Na +1
Carbon
C +4/-4
Beryllium
Be +2
Nitrogen
N -3
Helium
He 0
Potassium
K +1
Boron
B +3
Neon
Ne 0
Silicon
Si +4/-4
Hydroxide
OH -1
Sulfate
SO4 -2
Carbonate
CO3 -2
Nitrate
NO3 -1
Ammonium
NH4 +1
Nitrite
NO2 -1
Sulfite
SO3 -2
Phosphate
PO4 -3