Question:
There is no d d transition in Cu but Cu20 is coloured due to
Last updated: 7/2/2023
![There is no d d transition in Cu but Cu20 is coloured due to](https://media.kunduz.com/media/sug-question-candidate/20210329015051791624-2662149.jpg?h=512)
There is no d d transition in Cu but Cu20 is coloured due to 1 The presence of unpaired electron 2 The presence of coloured 0 ion 3 Charge transfer from oxygen to metal