The words

Question 1

covalent molecular substances

Answer 1

Do not conduct in any state. All electrons are held tightly in bonds so there are no free moving electrons to conduct a current

Question 2

Covalent network substances

Answer 2

Do not conduct in any state. All electrons are held tightly in bonds so there are no free moving electrons to conduct a current

Question 3

Metallic bonding conductivity

Answer 3

Metallic substances contain delocalized valence electrons which are free to move and conduct a current.

Question 4

Ionic bonding conductivity

Answer 4

Do not conduct in the solid state because the ions are held in fixed positions in the lattice and are therefore not able to move in order to conduct a current.

Question 5

Ionic bonding in a molten or solution state

Answer 5

In the molten state or in a solution the ions separate from the lattice and become free to move and so can conduct a current