MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Test tube of copper/1, 2 diaminoethane (ethylenediamine) complex ion. The ions of transition metals are coloured and this makes it possible to tell which ion is present in a solution. The copper/1, 2 diaminoethane complex ion is purple because most of the absorption band is in the green part of the spectrum - 530nm.
Model release not required. Property release not required.