superscripts are higher(they are exponents) and subscripts are normal big letters
hydrogen ion
H+
lithium ion
Li+
sodium ion
Na+
Potassium ion
K+
Rubidium ion
Rb+
Cesium ion
Cs+
Beryllium ion
Be²+
Magnesium ion
Mg²+
Calcium ion
Ca²+
Strontium ion
Sr²+
Barium ion
Ba²+
Radium ion
Ra²+
H-
Hydride
F-
flouride
Cl-
Chloride
Br-
Bromide
I-
Iodide
Oxide
O²-
Selenide
Se²-
Nitride
N³-
P³-
Phosphide
As³-
arsenide
Ag+
silver ion
Zn²+
zinc ion
Al³+
aluminum ion
Cu+
cuprous ion
Cu²+
Cupric ion
Au+
gold (1) ion
Au³+
Gold (3) ion
Sn²+
tin (2) ion
Sn^4+
Tin (4) ion
Ni²+
Nickel (2) ion
Ni^4+
Nickel (4) ion
Pb²+
Plumbous ion
Pb^4+
Plumbic ion
Fe²+
ferrous ion
Fe³+
ferric ion
Cr²+
Chromous ion
Cr³+
Chromic ion
Co²+
Cobalt (2) ion
Co³+
Cobalt (3) ion
Mn²+
Manganese (2) ion
Mn³+
Manganese (3) ion
Hg2² +
Mercury (1) ion
Hg²+
Mercury (2) ion
NO3-
Nitrate
NO2-
Nitrite
CrO4²-
chromate
Cr2O7²-
Dichromate
CO3²-
Carbonate
HCO3-
Bicarbonate
SO4²-
sulfate
SO3²-
Sulfite
PO4³-
Phosphate
PO3³-
Phosphite
MnO4-
permanganate
ClO4-
perchlorate
Clo3-
chlorate
ClO2-
chlorite
ClO-
Hypochlorite
IO4-
iodate
IO-
hypoiodate
BrO3-
Bromate
BrO-
Hypobromite
C2H3O2-
acetate
NH4+
ammonium ion
CN-
Cyanide
SCN-
Thiocyanate
OCN-
Cyanate
OH-
Hrdoxide
O2²
Peroxide
HSO4-
Bisulfate
HSO3-
Bisulfite
HPO4²-
Hydrogen phosphate
H2PO4-
Dihydrogen phosphate
C2O4²-
oxalate