Covalent Molecular Solids Full Summary

Question 1

Type Of Particles:

Answer 1

Non-metal atoms/molecules

Question 2

Forces Of Attraction Between Particles:

Answer 2

• Intramolecular forces: they are very strong covalent bonds between the atoms in each molecule
• Intermolecular forces: they are weak Van Der Waal forces linking the molecules to each other

Question 3

Electrical Conductivity:

Answer 3

The electrons are involved in covalent bonding and there are no freely moving charged particles, so therefore they cannot conduct electricity

Question 4

Melting/Boiling Point:

Answer 4

• Small molecules have low melting/boiling points due to weak intermolecular forces between particles, so not much energy is required to break them
• As the size of the molecule increases (molar mass), the number of intermolecular forces increases, so therefore more energy is required to break them, resulting in a higher melting/boiling point

Question 5

Solubility In Water:

Answer 5

• The polar molecules are soluble in water

- The non-polar molecules are insoluble in water

Question 6

Toughness:

Answer 6

Usually soft