Bonding

Question 1

Explain metallic bonding

Answer 1

Cations are arranged in a lattice structure surrounded by a sea of delocalised electrons

Question 2

How do delocalised electrons allow flow of electricity?

Answer 2

They carry a charge and can move freely

Question 3

What is the strength of metallic bonding dependent on?

Answer 3

The charge of a cation and the size of a cation

Question 4

Why do metals have high mp and bp?

Answer 4

Due to strong electrostatic attraction between cations and the delocalised sea of electrons

Question 5

How does the charge of cations affect the strength of a metallic bond?

Answer 5

greater charge = stronger bond
This is because a greater charge means a stronger force of attraction between cations and delocalised electrons

Question 6

How does the size of cations affect the strength of a metallic bond?

Answer 6

bigger size = weaker bond
This is because the larger the cation, larger the distance between the cations and delocalised electrons

Question 7

Explain the trend in melting points across the period

Answer 7

INCREASE
- Across a period, charge decreases,
- size of cations decrease,
- number of delocalised electrons per ion decreases