24.1 d-block Elements Flashcards
1
Q
Why do chromium and copper not follow the expected principle got electrons?
A
Half-filled ‘3D5 + 4S1’ and fully-filled ‘3D10 + 4S1’ are believed to give additional stability to chromium and copper
2
Q
What are transition elements?
A
Transition elements are d-block elements that form at least ONE ion with a PARTIALLY filled d-orbital
3
Q
What about scandium and copper?
A
Sc3+ ions have EMPTY d-orbitals while Zn2+ ions have FULL d-orbitals
Not classified as transition elements
4
Q
What makes transition elements different from other metals?
A
Form compounds where transition metal has DIFFERENT oxidation states
Form coloured compounds
Elements and their compounds can act as catalysts
