AQA · Chemistry · 8462
GCSE Chemistry (AQA): Nanoparticles
Topic 2 — Bonding, Structure & Properties of Matter. Generated from the caption track of Cognito's lesson video "GCSE Chemistry - Nanoparticles - Uses | Risks (2027/28 exams)"; each card deep-links to the moment in the video it came from. Lesson 2.15 of Cognito's AQA GCSE Chemistry (Triple) course (Higher tier), filed under AQA Chemistry 8462. Teaching by Cognito — https://cognitoedu.org/coursesubtopic/c2-gcse-aqa-h-t_2.15.
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Which nanoparticles are being researched to deliver drugs into cells?
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Fullerenes — spheres made of carbon atoms. They are small enough to enter cells.
Why are nanoparticle sunscreens more effective at blocking UV rays?
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They provide better coverage of the skin.
Which property of some nanoparticles allows them to be used in tiny electrical circuits?
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They can conduct electricity, allowing very small computer chips.
Give one environmental risk of nanoparticles in sunscreen.
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They wash into the sea and it is unknown whether they damage the environment there.
Why does a particle's surface area to volume ratio increase as it gets smaller?
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Because volume decreases more rapidly than surface area does.
Why is less material needed when a catalyst is made of nanoparticles?
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Only the exposed surface area matters for catalysis, and nanoparticles give far more surface area per unit volume.
Why can nanoparticles not be seen with a light microscope?
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They are far too small — under 100 nm (about 0.0000001 m) across.
What is nanoscience?
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The field of science that researches nanoparticles — particles 1–100 nm across.
Silver nanoparticles are infused into surgical masks and wound dressings for their ? properties.
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antibacterial
Why do some people argue nanoparticles should be regulated and labelled more strictly?
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Nanotechnology is new and its effects on the human body are not yet fully understood.
What is the diameter range of nanoparticles?
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Between 1 nm and 100 nm.
What is nanomedicine?
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The use of nanoparticles in medicine.
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