chemistry charges and formulae to memorise

charge of silver (Ag)

+1

charge of copper

+2

charge of iron (Fe)

+2 or +3

charge of lead (Pb)

+2

charge of zinc

+2

charge of hydrogen

+1

formula for hydroxide

OH-

formula for ammonium

NH4+

formula for carbonate

CO3 2-

formula for nitrate

NO3-

formula for sulfate

SO4 2-

formula for ammonia

NH3

formula for methane

CH4

formula for hydrochloric acid

HCl

formula for nitric acid

HNO3

formula for sulfuric acid

H2SO4

formula for carbonic acid

H2CO3

which elements are diatomic

H, N, O, F, Cl, Br, I