Macromolecules

Question 1

What are macro molecules

Answer 1

covalent bonds extend throughout the compound have a giant structure

leads to high melting point

Substances that have a macromolecular structure are ​covalently bonded​into a ​giant lattice structure

Question 2

examples of macro molecules

Answer 2

diamond and graphite

Question 3

The compounds can be hard or soft

Answer 3

Graphite is soft as the forces between the carbon layers are weak

Diamond and silicon(IV) oxide are hard as it is difficult to break their 3D network of strong covalent bonds

Question 4

Are macromolecules soluble in water

Answer 4

no insoluble

Question 5

Most compounds do not conduct electricity however some d

Answer 5

Graphite has delocalised electrons between the carbon layers which can move along the layers when a voltage is applied

Diamond and silicon(IV) oxide do not conduct electricity as all four outer electrons on every carbon atom are involved in a covalent bond so there are no freely moving electrons available