d-Block Elements (OCR A-Level Chemistry A): Flashcards

Between Group 2 and Group 13

4s electrons removed before 3d electrons

$3d^5 4s^1$ (not $3d^4 4s^2$)

$3d^{10} 4s^1$ (not $3d^9 4s^2$)

Forms at least one ion with partially filled d-orbital

Zn²⁺ has full $d^{10}$ config (not partially filled)

Sc³⁺ has empty d-orbitals (not partially filled)

Variable oxidation states, colored compounds, catalysts

Partially filled d-orbitals allow electron transitions

Zn²⁺ has full $d^{10}$ (no partially filled d-orbitals)