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

Think about a soccer stadium with a tiny pea in the center representing the nucleus. The electrons, like little ants, move around the stadium’s empty seats. Even though there’s a pea in the middle, most of the stadium is empty. That’s similar to an atom – it’s mostly empty space because the electrons are spread out far from the tiny nucleus. So, even though it looks solid, it’s mostly just empty space!