Particle Theory & its Limitations (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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Particle theory definition
Particle theory definition
Model explaining properties & behaviour of substances in all 3 states
What is all matter made of (particle theory)?
What is all matter made of (particle theory)?
Tiny particles constantly moving
Particle arrangement in solids
Particle arrangement in solids
Closely packed in regular pattern, vibrate in fixed positions
Shape & volume of solids
Shape & volume of solids
Fixed shape and fixed volume
Particle arrangement in liquids
Particle arrangement in liquids
Close together, arranged more randomly than solids
Why liquids can flow
Why liquids can flow
Particles can move around each other
Volume of liquids
Volume of liquids
Fixed volume
Particle arrangement in gases
Particle arrangement in gases
Far apart, move freely in all directions
Shape & volume of gases
Shape & volume of gases
No fixed shape or volume, expand to fill container
Particle theory limitation: shape assumption
Particle theory limitation: shape assumption
Assumes all particles are solid spheres (not true in reality)
Particle theory limitation: forces
Particle theory limitation: forces
Doesn't show forces between particles (attractions/repulsions)
Particle theory limitation: particle types
Particle theory limitation: particle types
Doesn't differentiate between atoms, ions, and molecules
Particle theory limitation: size
Particle theory limitation: size
Assumes all particles same size (they vary greatly)
Nature of particle theory
Nature of particle theory
Simplified model - doesn't capture all complexities