Section 4 - Transition Metals Flashcards Preview

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Flashcards in Section 4 - Transition Metals Deck (56)
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1

Define transition metal:

A metal that can form one or more stable ions with a partially filled sub-shell.

2

Which period 4, d-block elements are not transition metals?

Scandium and Zinc

3

What are the 3 physical properties of transition metals?

- high density

- high mpts and bpts

- similar ionic radii

4

What is the oxidation state/colour of:

MnO4

+7 - purple

5

What is the oxidation state/colour of:

Cr2O72-

+6 - Orange

6

What is the oxidation state/colour of:

VO2+

+5 - Yellow

7

What is the oxidation state/colour of:

VO2+

+4 - Blue

8

What is the oxidation state/colour of:

V3+

+3 - Green

9

What is the oxidation state/colour of:

Cr3+ 

+3 - Green/Violet

10

What is the oxidation state/colour of:

Fe3+

+3 - Yellow

11

What is the oxidation state/colour of:

V2+

+2 - Violet

12

What is the oxidation state/colour of:

Mn2+

+2 - Pale Pink

13

What is the oxidation state/colour of:

Fe2+

+2 - Pale Green

14

What is the oxidation state/colour of:

Co2+

+2 - Pink

15

What is the oxidation state/colour of:

Ni2+

+2 - Green

16

What is the oxidation state/colour of:

Cu2+

+2 - Blue

17

Define Complex Ion

A central metal atom/ion surrounded by co-ordinately bonded ligands.

18

What is the coordination number?

The number of coordinate bonds formed with the central metal ion

19

What are the usual coordination numbers?

6 for small ligands eg. water, ammonia

4 for large ligands eg. Cl-

20

What are the bond angles in a tetrahedral compex ion shape?

109.5

21

How do you calculate the oxidation state of a metal ion?

total oxidation state - sum of oxidation states of ligands

22

What are the bond angles in a square planar complex ion?

90

23

What complex ion forms a linear shape with bond angle 180?

[Ag(NH3)2]+

24

What is a monodentate ligand?

One which can form only one bond

25

What is a multidentate ligand?

One which can form more than one bond

26

What are the chemical properties of transition metals? (4)

- form complex ions

- form coloured ions

- good catalysts

- variable oxidation states

27

What is Haem?

Fe2+ ions with multidentate ligands

28

How does Haem transport oxygen?

Oxygen forms a co-ordinate bond to Fe(II) in haemoglobin , enabling oxygen to be transported in the blood.

29

Why is CO toxic?

Carbon monoxide is toxic because it replaces oxygen co-ordinately bonded to Fe(II) in haemoglobin.

30

What type of isomerism do some complex ions show?

Optical - when a complex metal ion has 3 bidentate ligands coordinately bonded to it