Describe the motion of the particles in gaseous argon at room temperature.
Practise Edexcel GCSE Physics Density and states of matter with exam-style questions for Foundation and Higher tier. 82 questions, matched to the Edexcel GCSE Physics (1PH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.