Eli5 why is that an atom is 99,6 % empty space ?

Question

Eli5 why is that an atom is 99,6 % empty space ?

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Answer 1

It’s like if you look at the earth and moon as one system, and called that an “atom”. Most of that system would be empty space, since there’s a lot of emptiness between the earth and moon.

An atom is similar, where the electrons “orbit” around the nucleus. Between the electrons and nucleus, is a lot of empty space, where that figure comes from.