Particle Theory & its Limitations (AQA GCSE Chemistry Combined Science): Flashcards
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Particle theory
Particle theory
Model explaining properties/behaviour of all 3 states of matter
What matter is made of (particle theory)
What matter is made of (particle theory)
Tiny particles in constant motion
Particle arrangement: solids
Particle arrangement: solids
Closely packed, regular pattern, vibrate in fixed positions
Solid properties: shape & volume
Solid properties: shape & volume
Fixed shape and fixed volume
Particle arrangement: liquids
Particle arrangement: liquids
Close together, random arrangement, move around each other
Liquid properties: shape & volume
Liquid properties: shape & volume
Take container shape, fixed volume
Particle arrangement: gases
Particle arrangement: gases
Far apart, move freely in all directions
Gas properties: shape & volume
Gas properties: shape & volume
No fixed shape/volume, expand to fill container
Limitation: particle shape assumption
Limitation: particle shape assumption
Assumes solid spheres; reality: varied shapes & structures
Limitation: forces between particles
Limitation: forces between particles
Doesn't show forces (e.g. van der Waals, ionic bonds)
Limitation: particle type differentiation
Limitation: particle type differentiation
Doesn't distinguish atoms, ions & molecules
Limitation: particle size
Limitation: particle size
Assumes same size; reality: particles vary (e.g. He vs protein)
Why particle theory has limitations
Why particle theory has limitations
It's a simplified model, doesn't capture all complexities