WorksheetsProperties of Covalent structures
Total questions: 14
Worksheet time: 8mins
Are covalent bonds strong or weak?
strong
weak
True of false? Simple molecular substances have low melting and boiling points.
true
false
Which two of the following are examples of simple molecules?
graphite
silicon dioxide
water
carbon dioxide
Why do simple molecular substances have low melting and boiling points?
The intermolecular forces between simple molecules are weak.
The covalent bonds holding the atoms together in a simple molecule are strong.
A large number of covalent bonds hold the atoms together in simple molecules.
What happens when a simple molecular substance melts or boils?
The weak intermolecular forces between the molecules break.
Strong covalent bonds between the atoms of the molecule break.
Why do weak intermolecular forces between simple molecules result in low melting and boiling points?
Little energy is needed to break the strong covalent bonds.
Little energy is needed to break the weak intermolecular forces.
Lots of energy is needed to break the weak intermolecular forces.
Which of the following simple molecular substances conduct electricity?
water
oxygen
carbon dioxide
all of these simple molecular substances
none of these simple molecular substances
Which two of the following are examples of giant covalent structures?
graphite
silicon dioxide
water
carbon dioxide
True of false? Giant covalent structures have low melting and boiling points.
true
false
True or false? All giant covalent structures conduct electricity.
true
false
Which of the following giant covalent structures conducts electricity?
diamond
graphite
silicon dioxide
all of these giant covalent structures
none of these giant covalent structures
True or false? All giant covalent structures are hard.
true false
true
false
Why do giant covalent structures have very high melting and boiling points?
Giant covalent structures are held together by a large number of strong covalent bonds that require a lot of energy to break them.
Giant covalent structures are held together by a large number of weak intermolecular forces that require a lot of energy to break them.
