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What will be the colour of Cd^(2+) salts? Explain.

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What will be the colour of Cd2+ salts? Explain.

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  • The electronic configuration of, 48Cd [Kr]36 3d10 5s2 and Cd2+ [Kr]363d10. 
  • Cd2+ ions have completely filled 3d subshell and there are no unpaired electrons in 3d-orbital. 
  • Hence d → d transition is not possible. 
  • Therefore, Cd2+ ions do not absorb radiations in the visible region and the salts of Cd2+ ions are colourless (or white). 
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