Transition Metals

Question 1

Transition Metals

Answer 1

d- block elements that can form at least one stable ion with a incomplete d sub-level

Question 2

Sc3+ and Zn2+

Answer 2

Do not form ions with partially filled d- shells

Question 3

Complex

Answer 3

Central metal or ion surrounded by co-ordinately bonded ligands

Question 4

Ligand

Answer 4

Molecule or ion that forms a co-ordinate bond with a transition metal by donating a pair of e-

Question 5

Co-ordination number

Answer 5

Number of Co-ordinate bonds formed with the central atom or ion

Question 6

Shape of Complex with 6 Co-ordinate bonds

Answer 6

Octahedral
90° bond angle
e.g. [Fe(H2O)6]2+
[Co(NH3)6]3+
[Cu(NH3)4(H2O)2]2+

Question 7

Shape of Complex with 4 Co-ordinate bonds

Answer 7

Tetrahedral
109.5° bond angle
e.g. [CuCl4]2- yellow
[CoCl4]2- blue

Square Planar
e.g. Cisplatin
90° bond angle

Question 8

Shape of Complex with 2 Co-ordinate bonds

Answer 8

Linear
180° bond angle
[Ag(NH3)2]+

Question 9

What does the overall charge on the complex ions represent?

Answer 9

Total Oxidation state

Question 10

Oxidation state of the Metal Ion only

Answer 10

Total oxidation state - Sum of Oxidation states of ligands

Question 11

Oxidation state of H2O ligand

Answer 11

0

Question 12

NH3 and H2O ligands

Answer 12

NH3 and H2O are similar in size and uncharged

Question 13

Monodentate Ligands

Answer 13

Ligands that can only form one co-ordinate bond, (only donate one pair of electrons to the complex ion)

Question 14

Bidentate ligands

Answer 14

Ligands that can form two co-ordinate bonds, ( donate two pairs of electrons)