The diameter of an atom ranges from
about 0.1 to 0.5 nanometer
The neutron has a positively charged
core of radius ≈ 0.3 fm surrounded by a compensating negative
charge of radius between 0.3 fm and 2 fm. The proton has an
approximately exponentially decaying positive charge distribution
with a mean square radius of about 0.8 fm.[13]
1 A = 100.000 fm
"A
proton has a diameter of approximately one-millionth of a nanometer"
10 elevat a -15 metres
1 Armstrong = 0,0000000001 m
(deu elevat a menys 10 metres)
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