3.2.5 Transition metals

Question 1

Transition metal

Answer 1

A d-block element that forms at least one stable ion with an incomplete d sub-shell.

Question 2

Ligand

Answer 2

A molecule or anion which donated a lone pair of electrons to a metal ion to form a coordinate bond.

Question 3

Complex

Answer 3

A central metal atom or ion bonded to one or more ligands by coordinate bonds.

Question 4

Coordination number

Answer 4

The number of coordinate bonds to the central metal atom or ion.

Question 5

Bidentate ligand

Answer 5

A ligand that has two atoms with a lone pair which can each form coordinate bonds with the metal ion.

Question 6

Multidentate ligand

Answer 6

A ligand that can form two or more coordinate bonds to a transition metal ion from different atoms on the same ligand.

Question 7

Stereoisomers

Answer 7

Stereoisomers are species with the same structural formula but with a different arrangement of atoms in space.

Question 8

Optical isomers

Answer 8

Non-superimposable mirror images.

Question 8

Ligand substitution

Answer 8

A reaction in which one ligand coordinately bonded to a central metal atom or ion is replaced by another.

Question 9

Chelate effect

Answer 9

The substitution of monodentate ligands by a bi- or multidentate ligand to form a more stable complex.