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Salts of [normal/transition] elements a...

Salts of _____ [normal/transition] elements are generally coloured. From the ions `k^(1+), Cr^(3+), Fe^(2+), Ca^(2+), SO_(3)^(2-), MnO_(4)^(1-), NO_(3)^(1-)` the ions generally coloured are ___________

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