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Bohr radius

physical constant; the most probable distance between an electron and the nucleus in a nonrelativistic model of the hydrogen atom with infinitely heavy nucleus

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#5321: From Millimeters to Atoms: The Units of Small

A millimeter is the last unit you can feel. Below it, the trades borrow microns, mils, and angstroms — and the atom is a different regime entirely.

Main topic Sep 18