6 Questions
Which state of matter has particles that vibrate in fixed positions?
Solid
What is the term used to describe the random motion of particles suspended in a fluid?
Brownian motion
In which state of matter are the particles arranged randomly and close together?
Liquid
What is the net movement of particles from an area of high concentration to an area of low concentration known as?
Diffusion
Which theory represents the three states of matter by modeling particles as small solid spheres?
Kinetic theory
What process involves a solid turning directly into a gas without becoming a liquid first?
Sublimation
Study Notes
States of Matter
- Particles that vibrate in fixed positions are characteristic of the solid state of matter.
- The term used to describe the random motion of particles suspended in a fluid is Brownian motion.
Arrangement of Particles
- In the solid state, particles are arranged randomly and close together.
Particle Movement
- The net movement of particles from an area of high concentration to an area of low concentration is known as diffusion.
Models of Particles
- The Kinetic Molecular Theory represents the three states of matter by modeling particles as small solid spheres.
Phase Changes
- The process in which a solid turns directly into a gas without becoming a liquid first is known as sublimation.
Test your knowledge on key concepts and definitions related to the particulate nature of matter in CAIE Chemistry IGCSE Topic 1. Definitions extracted or modified from the CAIE Specification for GCSE Chemistry are included for reference.
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