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NAME 2 COLOURLESS METAL IONS. |
| All d-block elements - popularly known as Transition metals have coloured cations. All s- block elements popularly known as Alkali metals and Alkaline earth metals have colourless cations. Colourless cations are Li+1, Na+1, K+1, .... Ca+2, Ba+2, Sr+2,...... Coloured cations are Fe+2, Fe+3, Cr+6, Cu+2, Mn+7, Ni+2, Co+3, .....?). |
