Covalent molecular substances

Question 1

What are the two different types of covalent substances?

Answer 1

Covalent molecular substances - discrete molecular

Covalent networks - giant networks

Question 2

What are covalent molecular substances made up of?

Answer 2

covalent molecular substances are made up of molecules joined together, in the liquid and solid states, by weak forces of attraction called Van der Waals forces.

Question 3

What is broken during melting and boiling points?

Answer 3

During melting and boiling it is only the weak forces of attraction that are broken.

Question 4

Why do covalent molecular substances have low melting and boiling points?

Answer 4

The process requires very little energy.

Question 5

what do the solid lines represent?

Answer 5

The solid lines represent the strong covalent bonds between the atoms within the molecules.

Question 6

what do the dotted lines represent?

Answer 6

The dotted lines represent the weak forces of attraction(van der waals) between the molecules.

Question 7

What structure has a low melting/ boiling point?

Answer 7

Any substance with a low melting/ boiling point has a covalent molecular structure.