Structure and bonding

Question 1

Metallic bonding definition

Answer 1

Electromagnetic force of attraction between positive metal ions and negative delocalised electrons

Question 2

What are the 3 larger covalent molecular elements?

Answer 2

Phosphorus (P4), sulphur (S8) and fullerene (C60)

Question 2

What intermolecular forces do covalent molecules have?

Answer 2

London dispersion forces

Question 3

Covalent molecules have _____ boiling points

Answer 3

Low

Question 4

Sulphur, phosphorus and fullerene have higher melting points than other covalent molecules because…

Answer 4

They have heavier molecules and have more electrons than the lighter molecules so have stronger London dispersion forces.

Question 4

Covalent networks have very ____ melting points

Answer 4

High

Question 5

Boron, carbon (excluding fullerene form) and silicon are…

Answer 5

Covalent network elements

Question 6

Diatomic molecules, phosphorus and silicon are…

Answer 6

Discrete covalent molecules

Question 7

Monatomic elements are held together by…

Answer 7

Weak London dispersion forces

Question 8

Monatomic elements are Nobel gasses and have very ____ melting points

Answer 8

Low

Question 9

As you go down the Nobel gases the LDF get _____ due to ___________

Answer 9

Stronger, an increased number of electrons