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Flashcards in 23 Deck (10):
1

What is a transition element?
Exceptions

A d block element which forms an ion with an incomplete d subshell
Chromium, copper (half/fully filled orbital is more stable)

2

Which d block elements are not transition metals?

Scandium, zinc - do not form ions with an incomplete d subshell

3

Properties of transition elements

Variable oxidation states
Forms coloured compounds
Catalysts (Contact/Haber)

4

Define ligand

A molecule or ion that donates a pair of electrons to a central metal ion to form a dative covalent bond

5

Define complex ion

A transition metal ion bonded to ligands by dative covalent bonds

6

Mono dentate ligands (donates 1 pair)

H2O, NH3, Cl-, CN-, OH-

7

Bi dentate ligands (donates 2 pairs)

1,2-diaminoethane (charge 0)

8

6 coordinate complex shape

Octahedral

9

4 coordinate complex shape

Tetrahedral - 109.5 degrees
Square planar - 90 degrees (transition metals with 8d electrons in highest d subshell)

10

Cis-trans isomerism

Cis - 90 degrees
Trans - 180 degrees