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How small is an atom? Comparing the size and number of atoms in tiny objects.Key facts
- Facts about the scale of an atom, for example:
- Atoms are 100 million times smaller than a mosquito.
- An atom is a tenth of nanometre in size, and a hundredth of the width of a human hair.
- An atom's size is measured in angstroms. An angstrom is equal to 1/10,000,000,000 of a metre.
Transcript
Atoms are small
Really really small
But how small?
Length of a mosquito
1 centimetre
Atoms wide: 100,000,000
Width of a human hair
100 micrometres
Atoms wide: 1,000,000
Diameter of HIV virus
100 nanometres
Atoms wide: 1000
Thickness of bacteria cell wall
10 nanometres
Atoms wide: 100
Width of the ...
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