Sizes of Particles & their Properties (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Size range of nanoparticles
Size range of nanoparticles
1 to 100 nanometres (nm)
Definition of a nanometre
Definition of a nanometre
A billionth of a metre
Number of atoms in nanoparticles
Number of atoms in nanoparticles
A few hundred atoms
Size range of fine particles
Size range of fine particles
100-2,500 nm
Size range of coarse particles
Size range of coarse particles
2,500-10,000 nm
Alternative name for fine particles
Alternative name for fine particles
PM2.5
Alternative name for coarse particles
Alternative name for coarse particles
Dust
Surface area to volume ratio of nanoparticles
Surface area to volume ratio of nanoparticles
Very high compared to larger particles
Why high surface area to volume ratio matters
Why high surface area to volume ratio matters
Makes nanoparticles more reactive and effective
Roles of nanoparticles due to high surface area
Roles of nanoparticles due to high surface area
Act as catalysts or be absorbed by body
Effect of shrinking a cube by 10 times
Effect of shrinking a cube by 10 times
Surface area to volume ratio increases by 10 times
Efficiency benefit of nanoparticles
Efficiency benefit of nanoparticles
Use smaller amounts to achieve same effect as larger particles