Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
The arrangement of the particles
19 practice questions
Practice questions
1–10 of 19
Question 1
1 mark · Easy
Answer and see the solution →State the arrangement of particles in a solid.
Question 2
3 marks · Easy
Answer and see the solution →The diagram below shows three beakers, each containing a different substance at room temperature.
Each beaker represents a state of matter. (a)[1 mark]State which beaker would represent water vapour. Give a reason for your answer.
(b)[1 mark]Describe the arrangement of the particles in the beaker containing a liquid.
(c)[1 mark]Explain why solids keep their shape, using the particle model.
Question 3
2 marks · Easy
Answer and see the solution →Explain why a gas can be compressed easily, but a solid cannot, using the particle model.
Question 4
3 marks · Easy
Answer and see the solution →Physical properties of three substances at room temperature Substance Volume (cm³) Can flow? Keeps shape? X 100 No Yes Y 100 Yes Takes container shape Z 200 Yes No (a)[1 mark]Which substance is most likely a solid? Give a reason for your answer.
(b)[2 marks]Describe the arrangement and movement of the particles in substance Z.
Question 5
1 mark · Easy
Answer and see the solution →State the movement of particles in a liquid.
Question 6
3 marks · Easy
Answer and see the solution →Describe the arrangement and movement of particles in each of the three states of matter.
(a)[1 mark]Solid
(b)[1 mark]Liquid
(c)[1 mark]Gas
Question 7
2 marks · Easy
Answer and see the solution →A single cube of a solid is made up of 1000 closely packed particles. When it melts to become a liquid, the particles move slightly further apart so that the same number of particles now fills 1050 units of volume.
Calculate the percentage increase in the volume occupied by the particles after melting.
Give your answer to 2 significant figures.
Question 8
2 marks · Easy
Answer and see the solution →A cylinder of gas contains 0.012 moles of gas molecules that are free to move in a space of 300 cm^3. If these same particles were packed into a solid state, they would occupy only 50 cm^3.
Calculate how many times greater the volume occupied by the particles is in the gas state compared to the solid state.
Show your working.
Question 9
2 marks · Normal
Answer and see the solution →Describe the movement of particles in a gas compared to the movement of particles in a solid.
Question 10
4 marks · Normal
Answer and see the solution →The table shows some properties of three substances, P, Q and R, at room temperature. Use your knowledge of the arrangement and movement of particles in different states to answer the questions.
Substance Shape Compressibility Flows P Fixed No No Q Not fixed Yes Yes R Not fixed No Yes (a)[3 marks]Identify the state of matter (solid, liquid or gas) for each substance: P, Q and R.
(b)[1 mark]State one difference in particle arrangement between substances P and Q.