An aluminium block is placed inside a much larger mould. The block keeps its own shape instead of taking the shape of the mould. Which statement about the particles in the aluminium explains this?
Strong attractions hold the particles in fixed positions.
The particles have stopped moving, so none can leave its place.
Air in the gaps between the particles holds them in place.
The particles are touching but can slide past one another.
93 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.