At 20 ∘C20\,^\circ\text{C}20∘C, chlorine is a gas, mercury is a liquid, and iron is a solid.
Which statement is correct?
At 20 ∘C20\,^\circ\text{C}20∘C, mercury does not have enough thermal energy to melt.
At 20 ∘C20\,^\circ\text{C}20∘C, chlorine does not have enough thermal energy to condense.
Mercury has a higher boiling point than chlorine and a higher melting point than iron.
Iron has a higher boiling point than mercury and a higher melting point than chlorine.
27 exam-style questions on OCR GCSE Chemistry The particle model. Each one has a worked solution and a mark scheme showing where the marks go.