Simple Covalent substances

Question 1

What are the 2 types of covalent substances?

Answer 1

Simple covalent (simple molecular)
Giant covalent (macromolecular)

Question 2

Explain the melting point of simple covalent

Answer 2

Atoms held together by strong covalent bonds
Not broken when melted/boiled
Molecules held together by weak intermolecular forces
Relatively weak forces & require little energy to break
Low melting & boiling points

Question 3

Explain the solubility of simple covalent

Answer 3

Non-polar substances cannot interact with water molecules
Tend to be insoluble in water

Question 4

Explain the conductivity of simple covalent

Answer 4

Have no mobile charge carriers = do not conduct electricity

Question 5

Why are liquids and gases as molecules not described as simple covalent lattices whereas solids are?

Answer 5

Liquids and gases - are not held in a regular arrangement
Solids - held in a regular arrangement