General Properties of Transition Metals (AQA A-Level Chemistry): Flashcards

Form stable ions with incomplete $d$-sublevel

Central metal ion bonded to ligands via coordinate bonds

Donate lone pairs of electrons to the metal ion

Electronic transitions in $d$-sublevel absorb visible light

Blue

Close energy levels of $4s$ and $3d$ orbitals

Provide lower activation energies, can change oxidation states

Iron (Fe)

$3d^{5}4s^{1}$ (half-filled $3d$ provides stability)

$3d^{10}4s^{1}$ (fully filled $3d$ is more stable)