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SingaporeCombined ScienceQuick questions
Chemistry: Atoms, Bonding and the Mole
Quick questions on Particulate nature of matter explained: O-Level Combined Science
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the kinetic particle theory?Show answer
All matter is made of tiny particles that are in constant motion. The hotter the substance, the more energy the particles have and the faster they move. The way the particles are arranged and how freely they move decides whether a substance is a solid, a liquid or a gas.
What is diffusion?Show answer
Diffusion is the spreading of particles from a region of high concentration to a region of low concentration, caused by their random motion. It happens faster in gases than liquids because gas particles move more quickly and are further apart. Lighter (less dense) particles diffuse faster than heavier ones at the same temperature.
What is q1?Show answer
Describe the arrangement of particles in a liquid. [2 marks]
What is q2?Show answer
Name the change of state when a gas turns into a liquid. [1 mark]
What is q3?Show answer
Explain why diffusion is faster in a gas than in a liquid. [2 marks]
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