1 E-10 m: Encyclopedia II - Angstrom - Definition1 ångström (Å) = 10–10 metres = 0.1 nm
For comparison, the average diameter of an atom, calculated from its empirical radius, ranges from approximately 0.5 Å for hydrogen (the smallest element) to 3.8 Å for uranium (one of the largest naturally occuring elements on Earth).
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