.0000000001
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The Vander Waal radius ranges from 1.2*10^-10 to 3.5*10^-10 metres.
so that we can easy to know the measuring mass of an atom
It's not necessary to put numbers of this size into scientific notation but if you really have to, go with 4.125 x 10^0
It's not necessary to put numbers of this size into scientific notation but if you really have to, go with 4.215 x 10^0
A proton is 2x10^-14m, or 0.00000000000002m