Sizes of Particles & their Properties (AQA GCSE Chemistry): Flashcards
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What is the size range of nanoparticles?
What is the size range of nanoparticles?
1-100 nanometres (nm)
What is a nanometre?
What is a nanometre?
A billionth of a metre
How many atoms are in nanoparticles?
How many atoms are in nanoparticles?
A few hundred atoms
What is the size range of fine particles?
What is the size range of fine particles?
100-2,500 nm
What is the size range of coarse particles?
What is the size range of coarse particles?
2,500-10,000 nm
Surface area to volume ratio of nanoparticles vs larger particles
Surface area to volume ratio of nanoparticles vs larger particles
Very high
Why is high surface area to volume ratio important in nanoparticles?
Why is high surface area to volume ratio important in nanoparticles?
More reactive/effective as catalysts or absorbed by body
What happens to surface area to volume ratio when a cube shrinks by 10x?
What happens to surface area to volume ratio when a cube shrinks by 10x?
Increases by 10 times
What is the efficiency benefit of nanoparticles?
What is the efficiency benefit of nanoparticles?
Smaller amounts achieve same effect as larger particles
What is the alternative name for fine particles?
What is the alternative name for fine particles?
PM2.5
What is the common name for coarse particles?
What is the common name for coarse particles?
Dust