Structure and Bonding of the first twenty elements

Question 1

Metallic Bonding consists of …

Answer 1

Positive metal ions surrounded by a pool of delocalised outer electrons

Question 2

How do metals conduct electricity?

Answer 2

Delocalised electrons which are free to move

Question 3

What bonding and structure do Diatomic elements have?

Answer 3

Intramolecular covalent bonds, intermolecular LDF, molecular structure

Question 4

When a covalent molecular element is melted which bonds are broken?

Answer 4

The weak intermolecular London Dispersion Forces, not the strong covalent bonds.

Question 5

When a covalent network element is melted which bonds are broken?

Answer 5

Covalent bonds, this is why networks have such high mp’s

Question 6

Name the covalent network elements

Answer 6

Carbon graphite/diamond, Boron and Silicon

Question 7

Why are monatomic elements gaseous at room temperature

Answer 7

They only have weak LDFs between atoms and so very little energy is required to break the bonds.

Question 8

What happens to LDFs as you increase number of electrons

Answer 8

Strength increases

Question 9

Which of the following elements would require covalent bonds to be broken when melted:
Helium
Nitrogen
Boron
Sodium

Answer 9

Boron