Question : If the size of the nucleus of an atom is compared with a cricket ball, then the radius of the atom is approximately equal to how many kilometres?
Option 1: 0.5
Option 2: 0.005
Option 3: 0.05
Option 4: 5
Correct Answer: 5
Solution : The correct option is 5 .
A cricket ball represents the tiny nucleus of an atom. If that's the scale, the whole atom would be roughly as big as a 5-kilometre-wide sphere. That's because while the nucleus packs most of the atom's mass, it occupies only a fraction of its volume. The electrons occupy most of the space and revolve around the nucleus at incredible speeds in a vast, mostly empty region.
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