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Comparing nano scale to atoms and molecules

Bonding, structure and the properties of matter • Bulk and surface properties

Key concepts

What you'll likely be quizzed about

  • The nanometre equals 1 × 10^-9 metres.
  • The ångström (Å), measuring 1 × 10^-10 metres, is frequently used for atomic dimensions.
  • Conversion between units clarifies scale: 1 nm equals 10 Å and 1 Å equals 0.1 nm.
  • Using these units improves precision when discussing atoms (Å) and nanoparticles (nm).

Flashcards

Test your knowledge with interactive flashcards

How many ångströms equal one nanometre?

Click to reveal answer

One nanometre equals 10 ångströms.

Key notes

Important points to keep in mind

1 nm equals 10^-9 metres; 1 Å equals 10^-10 metres.

Atoms typically measure about 0.1 nm in diameter.

Nanoparticles range from 1 to 100 nm; size defines when surface effects emerge.

Higher surface area to volume ratio at smaller sizes enhances reactivity.

Effective measured size can exceed core size due to coatings or hydration shells.

Light microscopy cannot resolve nanoparticles; electron and AFM methods do.

Large molecules can span several nanometres and overlap with the nanoparticle range.

Aggregation reduces surface area per mass, shifting behavior toward bulk properties.

Quantum confinement impacts optical and electrical behavior in the smallest nanoparticles.

Using nm versus Å improves clarity regarding atomic and nanoparticle sizes.

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