Transition Metals Flashcards Preview

Advanced Higher Chemistry: Unit 1- Inorganic And Physical Chemistry > Transition Metals > Flashcards

Flashcards in Transition Metals Deck (25):
1

What are transition metals said to be? (Block)

D-block elements

2

Give the definition of transition metals

Transition metals form at least one ion with a partially filled d-sub shell

3

The d orbitals are filled according to the Aufbau principle, with the exception of what 2 elements?

Copper
Chromium

4

What are half filled d orbitals said to be and why?

More stable due to the equal distribution of charge around the atom

5

What are the 3 d5 configuration anomalies ?

Chromium
Molybdenum
Tungsten

6

What are the 2 d10 configuration anomalies?

Copper and silver

7

What can transition metals exhibit ?

Variable valency - the atoms can lose the 4s electrons and some or all of the 3d electrons

8

What do transition metals have?

Coloured ions

9

Why are Sc3+ and Zn2+ not considered transition metals?

Because they do not have a partially filled d-subshell

10

What does a transition metal complex consist of ?

A central transition metal ion surrounded by ligands

11

What are ligands ?

Electron rich (have non-bonding pairs of electrons) or are negatively charged ions

12

What are ligands said to be ?

Neutral or anionic non-metal species

13

What do ligands act as?

Electron donors to the transition metal ion

14

What do ligands form bonds with?

The transition metal ions by donating non-bonding electrons to empty d-orbitals on the central TM ion

15

The Ligand donates both electrons in the new bond. What is this bond called?

A dative covalent bond (represented by an arrow)

16

How may ligands be attached to the metal ion?

By a single atom (monodentate) or bound to the metal through two or more atoms (bidentate, tridentate)

17

Give 2 examples of monodentate ligands ?

Ammonia
Water

18

Give 2 examples of bidentate ligands ?

Ethanedioate ion
1,2- diaminoethane

19

Give an example of a hexadentate ligand ?

EDTA4-

20

What is the mole ratio of the metal ion to EDTA ?

1:1

21

What is the cooridination number of the ion?

The number of BONDS from the Ligand to the central ion

22

What are coordination number and geometry determined by?

A combination of metal ion size and Ligand size

23

What shape are complexes with coordination number 4 typically?

Tetrahedral or square planar

24

What shows the coordination number of the TM ion?

The chemical formulae

25

What shape are complexes with coordination number 6 typically?

Octahedral