simple covalent compounds.

Question 1

what type of melting and boiling points does it have and can it conduct electricity?

Answer 1

low.
no.

Question 2

what do simple covalent molecules have?

Answer 2

weak intermolecular forces.

Question 3

how are the strong covalent bonds represented in diagrams?

Answer 3

2 lines.

Question 4

how are the weak intermolecular forces between ions shown?

Answer 4

dots/ dotted line.

Question 5

chlorine is a yellow green gas at room temperature. boiling point is -34 degrees. explain why chlorine has a low boiling point? ( 3 marks.)

Answer 5

chlorine exists in a single covalent molecule .
between molecules of chlorine there are weak intermolecular forces.
this leads to a low boiling point because the bonds are easily overcome (doesn’t take a lot of energy.)

Question 6

explain why molten sodium chloride can conduct electricity but liquid bromine cannot. (3 marks.)

Answer 6

sodium chloride is an ionic compound.
when molten , charged ions are free to move around.
bromine is a simple covalent molecule.
bromine: no free ions /electrons charge carries. can’t carry a current.