Question

) Why is Sc3+ colourless ?​

Answer 1

Answer:

The colour obtained by D-Block i.e Transition elements is due to the presence of unpaired electrons which can let d-d transition occur.

However If there are no electrons or if the d-orbital is completely filled then d-d transition cannot occur and hence no colour can be obtained.

In this case, The electronic configuration of Scandium in ground state is [Ar] 3d1 4s2

When it's losing 3 electrons from its valence shell to form +3 cation, it's electronic configuration becomes

[Ar] 3d0 4s0 which implies that it has no electrons in d-orbital to let d-d transition occur.

and hence, Sc3+ is colourless..

Answer 2

Answer:

sc3+ is colourless

Explanation:

sc3+is 3d system. and there are no d electrons

Due to this d-d transition not possible in sc3+

hence it is colourless