Chemistry Of The P-block

Question 1

Define amphoteric

Answer 1

Ions can react with and act as both a base and acid, reacting to forms salt and water in neutralisation reaction

Question 2

What is the Inert Pair Effect?

Answer 2

The tendency of the outermost s2 pair of electrons in am atom to remain unshared in compounds, leading to a lower oxidation state
This occurs in groups 3,4, and 5.

Question 3

What 2 p-block elements have amphoteric behaviour?

Answer 3

Al / Al3+
Pb / Pb2+

Question 4

What is the Octet Rule ?

Answer 4

Atoms with an atomic number below 20 tend to combine so that their valence shells each have 8 electrons.

Question 5

What are the exceptions to The Octet Rule?

Answer 5

If molecules have an odd number of electrons
If the money contains atoms which have more than 8 electrons
Molecules contain atom with less than 8 electrons

Question 6

Describe the stability of oxidation states changes down Group 4?

Answer 6

In group 4, stability of the +4 oxidation state reduces down the group, whilst stability of the +2 oxidation state increases down the group

Question 7

Describe how the stability of oxidation states changes down the Group 5

Answer 7

In group 5, stability of the +5 oxidation states changes reduces down the group