Question

Write down the number of 3d electrons in the following ion:

Ti²⁺

Indicate how would you expect the five 3d orbitals to be occupied for this hydrated ions (octahedral).

Answer 1

Metal ion	Number of d-electrons	Filling of d-orbitals
Ti2+	2	\[\ce{t^2_{2g}}\]

Answer 2

Ti²⁺: 3d²

Filling of orbitals in an octahedral hydrated ion:

Ti²⁺: \[\ce{t^2_{2g}}\]

	eg
↑	↑	t2g

(2 unpaired electrons)