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each number listed is small at the bottom,,,,,,,unless it shows x^1 then it's to the power,,,,,,,,plus and negative is ALWAYS to the power
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ammonium
NH4+
copper I
Cu+
hydrogen
H+
hydronium
H3O+
lithium
Li+
potassium
K+
rubidium
Rb+
silver
Ag+
sodium
Na+
barium
Ba²+
cadmium
Cd²+
calcium
Ca²+
chromium II
Cr²+
cobalt II
Co²+
copper II
Cu²+
iron II
Fe²+
lead II
Pb²+
magnesium
Mg²+
manganese
Mn²+
mercury I
Hg2²+
mercury II
Hg²+
nickel
Ni²+
strontium
Sr²+
tin II
Sn²+
zinc
Zn²+
aluminum
Al³+
chromium III
Cr³+
iron III
Fe³+
lead IV
Pb^4+
tin IV
Sn^4+