Matter
ICSE · Class 8 · Chemistry
Quick revision notes for Matter — ICSE Class 8 Chemistry. Key concepts, formulas, and definitions for last-minute revision.
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Nature of Matter
- Chemistry deals with the study of various kinds of matter, including structure, composition, and physical and chemical properties.
- Greek philosophers believed matter is made of fire, water, air, and earth.
- Indian philosophers believed matter is made of five elements.
States of Matter
- Matter exists in three main states: solid, liquid, and gas.
- Solid has definite shape and definite volume.
- Liquid has definite volume but no definite shape.
Kinetic Theory and Particle Motion
- Matter is made up of very small particles called atoms and molecules.
- Particles of matter are always in random motion.
- Particles possess kinetic energy.
Interparticle Space and Force of Attraction
- Particles of matter have spaces or gaps between them called interparticle or intermolecular spaces.
- There is a force of attraction between particles of matter called interparticle or intermolecular force of attraction.
- In solids, intermolecular space is almost negligible and force of attraction is strong.
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