fixed charge
hydrogen ion
H+
lithium ion
Li+
sodium ion
Na+
potassium ion
K+
ribidium ion
Rb+
cesium ion
Cs+
beryllium ion
Be+2
magnesium ion
Mg+2
calcium ion
Ca+2
strontium ion
Sr+2
barium ion
Ba+2
radium ion
Ra+2
silver ion
Ag+2
zinc ion
Zn+2
hydride
H-
fluoride
F-
chloride
Cl-
bromide
Br-
iodide
I-
oxide
O2-
sulfide
S2-
selenide
Se2-
telluride
Te2-
nitride
N3-
phosphide
P3-
arsenide
As3-
nickel ion
Ni+2
aluminum ion
Al+3