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If the nucleus (A proton) is 2.4 cm, the the entire hydrogen atom should be 120,000 cm, or 1.2 km in diameter. So you need a lot of room for this model.

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15y ago
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13y ago

Several Kilometers

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Q: Suppose you built a scale-model atom in which the nucleus is the size of a tennis ball About how far would the cloud of electrons extend?
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