5.5 Transition Metals

Question 1

Transition Metal

Answer 1

A transition metal forms at least one stable ion with a partially filled d sub-shell.

Question 2

D-Block element

Answer 2

An element which has an atom with its highest energy level electron in a d sub-shell.

Question 3

Complex

Answer 3

A central metal atom or ion with ligands bonded by co-ordinate bonds.

Question 4

Ligand

Answer 4

The name given to any ion or molecule with a lone pair of electrons which forms a co-ordinate bond with a central metal atom or ion in a complex.

Question 5

Monodentate Ligand

Answer 5

A monodentate ligand uses only one lone pair of electrons to form a co-ordinate bond with a central metal atom or ion in a complex.

Question 6

Bidentate Ligand

Answer 6

A bidentate ligand uses two lone pairs of electrons to form two co-ordinate bonds with a central metal atom or ion in a complex.

Question 7

Polydentate/Chelating Liquid

Answer 7

A polydentate liquid uses many (more than one) lone pairs of electrons to form more than two co-ordinate bonds with a central metal atom or ion in a complex.

Question 8

Co-ordination Number

Answer 8

The co-ordination number of a complex is the number of co-ordinate bonds from ligands to the central atom or ion.