Question

Define correct to write the electronic configuration of scandium and aluminium

Answer 1

Atomic number of Scandium is 21
In Scandium, 3d subshell starts filling up.
So, its electronic configaration is 1s2 2s2 2p6 3s2 3p6 3d1 4s2.


Electronic configaration of aluminium is 1s2 2s2 2p6 3s2 3s1.

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