Starter quiz
- A beaker contains 5 red beads, 9 yellow beads and 7 blue beads. Which of the following ratios are correct?
- The ratio of yellow beads to blue beads is 9 : 7. ✓
- The ratio of blue beads to red beads is 5 : 7.
- The ratio of yellow beads to red beads is 9 : 5. ✓
- The ratio of red beads to blue beads is 7 : 5.
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- Place the following prefixes in order of size, starting with the largest.
- 1⇔kilo-
- 2⇔deci-
- 3⇔centi-
- 4⇔milli-
- What type of bond can be found between carbon atoms in materials such as diamond?
- Covalent bonds. ✓
- Intermolecular forces.
- Ionic bonds.
- Metallic bonds.
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- Giant covalent structures have a high melting and boiling point because the covalent bonds need a lot of ______ to be broken.
- 'energy' ✓
- What is a nanotube?
- A fullerene in the shape of a cylinder. ✓
- An allotrope of carbon. ✓
- A single sheet of carbon atoms one-atom-thick.
- A sphere of carbon atoms.
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- Why are graphene and graphite thermal and electrical conductors?
- They contain delocalised electrons. ✓
- All the carbon outer shell electrons form covalent bonds.
- Each carbon forms three covalent bonds. ✓
- The electrons remain in fixed positions.
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Exit quiz
- Match each term to the correct definition.
- Nanometre⇔Unit used to measure very small things. ✓
- Nanoparticle⇔A very small particle. ✓
- Nanoparticulate⇔A material made of nanoparticles. ✓
- Surface area to volume ratio⇔The total surface area of an object divided by its volume. ✓
- Place the following prefixes in order of size from the largest to the smallest.
- 1⇔milli-
- 2⇔micro-
- 3⇔nano-
- 4⇔pico-
- What do we call materials made up of particles?
- 'Particulate matter' ✓
- A cubic shaped nanoparticle has a side length of 5 nm. Which of the following statements about the nanoparticle are true?
- The surface area to volume ratio of the cube is 6 : 5. ✓
- The surface area of the cube is 150 nm². ✓
- The volume of the cube is 150 nm².
- The surface area to volume ratio of the cube is 125 : 150.
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- True or false? Nanotubes are thermal and electrical conductors.
- True ✓
- False
- Explain why nanoparticles are used as catalysts in chemical reactions.
- They have a high surface area to volume ratio. ✓
- They have a high tensile strength.
- They have high melting points.
- The have delocalised electrons.
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Worksheet
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Lesson Details
Key learning points
- The prefixes milli-, micro-, nano-, and pico-, in this order, subdivide a metre into smaller and smaller divisions.
- Nanoparticles are 1-100 nm in size, and are larger than atoms and molecules.
- The smaller a particle, the bigger its surface area to volume ratio.
- Nanotubes are very small and extremely strong fibres that are thermal and electrical conductors.
- Nanoparticles have many applications; new applications for nanoparticulate materials are an important area of research.
Common misconception
Pupils might think all nanoparticles are hazardous without considering their varied applications and benefits.
Clarify that while nanoparticles may pose risks, they also offer significant benefits in medicine, technology, and environmental protection, with risks varying by type and usage.
Keywords
Nanometre - A unit used to measure very small distances, equal to 10⁻⁹ metres or one billionth of a metre.
Nanoparticle - A very small particle, typically ranging from 1 to 100 nanometres in size.
Standard form - Written in the form a × 10ⁿ, where 1 ≤ a < 10 and n is any positive or negative integer.
Nanoparticulate - A material composed of nanoparticles.
Surface area to volume ratio - The total surface area of an object divided by its volume.
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