Particle Theory & its Limitations (AQA GCSE Chemistry): Flashcards
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Particle theory definition
Particle theory definition
Model explaining properties & behaviours of substances in all three states
Basic principle of particle theory
Basic principle of particle theory
All matter is made up of tiny particles constantly moving
Particle arrangement in solids
Particle arrangement in solids
Closely packed in regular pattern, vibrate in fixed positions
Shape and volume of solids
Shape and volume of solids
Fixed shape and fixed volume
Particle arrangement in liquids
Particle arrangement in liquids
Close together but arranged randomly, can move around
Shape and volume of liquids
Shape and volume of liquids
Take shape of container, fixed volume
Particle arrangement in gases
Particle arrangement in gases
Far apart and move freely in all directions
Shape and volume of gases
Shape and volume of gases
No fixed shape or volume, expand to fill container
Limitation: particle shape assumption
Limitation: particle shape assumption
Assumes all particles are solid spheres, but they have different shapes
Limitation: forces between particles
Limitation: forces between particles
Doesn't show forces like van der Waals or ionic bonds
Limitation: particle type differentiation
Limitation: particle type differentiation
Doesn't distinguish atoms, ions, and molecules
Limitation: particle size assumption
Limitation: particle size assumption
Assumes all same size, but particles vary greatly
Why particle theory has limitations
Why particle theory has limitations
It's a simplified model, doesn't capture all complexities