ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Metal compound solutions. The volumetric flasks contain solutions of an assortment of metals. The five at left are salts of transition metals, which tend to have coloured ions. The three at right are the salts of non-transition metals, whose ions are generally colourless. This difference is due to the arrangement of electrons in the ions.
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