AP Chem Summer Homework-- finding diameter of a model?

If you wanted to make an accurate scale model of the hydrogen atom and decided that the nucleus would have a diameter of 2 mm, what would be the diameter of the entire model?

Answer:
Nucleus = 10^-15 metres diameter

Atom = 10^-10 metres diameter.

10^-10 / 10^-15 = 100000 times bigger.

2 mm * 100000 = 200,000 mm or 200 metres.

I think you should re-think your sizing.

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