Graphite and buckminsterfullerene, $C60\mathrm{C_{60}}$ , are both forms of carbon.

A student predicts, "Both substances contain strong covalent bonds between carbon atoms, so they will have similarly high melting points."

Which statement about the student's prediction is correct?

The prediction is wrong, because $C60\mathrm{C_{60}}$ is made of separate molecules, so only weak intermolecular forces are overcome when it melts.

The prediction is wrong, because the covalent bonds between carbon atoms in $C60\mathrm{C_{60}}$ are much weaker than those in graphite.

The prediction is right, because melting either substance means breaking covalent bonds between carbon atoms.

The prediction is wrong, because graphite is made of layers, so only the weak forces between layers are overcome when it melts.

Graphite and buckminsterfullerene, $C60\mathrm{C_{60}}$ , are both forms of carbon.

A student predicts, "Both substances contain strong covalent bonds between carbon atoms, so they will have similarly high melting points."

Which statement about the student's prediction is correct?

The prediction is wrong, because $C60\mathrm{C_{60}}$ is made of separate molecules, so only weak intermolecular forces are overcome when it melts.

The prediction is wrong, because the covalent bonds between carbon atoms in $C60\mathrm{C_{60}}$ are much weaker than those in graphite.

The prediction is right, because melting either substance means breaking covalent bonds between carbon atoms.

The prediction is wrong, because graphite is made of layers, so only the weak forces between layers are overcome when it melts.

2.3 Properties of materials

2.3 Properties of materials Questions