Hydrogen

First 20 elements Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulphur Chlorine Argon Potassium Calcium

Reactivity series H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca

Potassium Sodium Calcium Magnesium Aluminium Zinc Iron Lead

K Na Ca Mg Al Zn Fe Pb

Copper Mercury Silver Platinum Gold

Cu Hg Ag Pt Au

H2

Flame Colour Potassium

Purple

Sodium

Golden yellow

Calcium

Brick red

Copper

Greenish blue

Ions Colour Ions Iron (II)

Chemical formula Fe2+

Colour Pale green

Iron (III)

Fe3+

Yellow

Copper (II)

Cu2+

Greenish blue

Permanganate

MnO4-

Purple

Dichromate

Cr2O72-

Orange

Chromium (III)

Cr3+

Green

Nickel (II)

Ni2+

Green

Manganese

Mn2+

Very pale pink

Names of common positive ions With 1 positive charge With 2 positive charges With 3 positive charges Name C.F. Name C.F. Name C.F. + 2+ Lithium ion Li Magnesium ion Mg Aluminium ion Al3+ Sodium ion Na+ Calcium ion Ca2+ Iron (III) ion Fe3+ + 2+ Potassium ion K Iron (II) ion Zn Silver ion Ag+ Zinc ion Fe2+ Hydrogen ion H+ Copper (II) ion Cu2+ + Ammonium ion NH4 Lead (II) ion Pb2+ Copper (I) ion Cu+

Names of common negative ions With 1 negative charge With 2 negative charges Name C.F. Name C.F. Fluoride ion F Oxide ion O2Chloride ion Cl Sulphide ion S2Bromide ion BrSulphite ion SO32Iodide ion I Sulphate ion SO42Nitrite ion NO2- Carbonate ion CO32Nitrate ion NO3- Dichromate ion Cr2O72Hydroxide ion OH Hydrogencarbonate ion HCO3Hydrogensulphate ion HSO4Permanganate ion MnO4-

With 3 negative charges

Name Nitride ion

C.F. N3-