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Transition metal ion colours

Transition metal ion colours

A710/0095

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Credit

MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY

Caption

Transition metal ion colours. The coloured solutions are of transition metal salts, with one colourless solution of a non-transition metal salt (sodium sulphate) for comparison. The electronic structure of transition metals absorb light at particular wavelengths, giving rise to strongly coloured ions and complexes. From left to right, the solutions and their chemical formulae are: iron (II) sulphate (FeSO4), sodium sulphate (Na2SO4), copper (II) sulphate (CuSO4), nickel (II) sulphate (NiSO4), cobalt (II) chloride (CoCl2), and iron (III) chloride (FeCl3).

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Model release not required. Property release not required.

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