How do you find the thickness of a molecule?

Answer 1

we dont find thickness of molecule we find the radius of it vander waal radius for gases.

first of all we take a beaker (all dimension are known),

then we inject molecules of substance but a uniform flow and with the use of atomizer these atoms or molecules settle down on the bottom of beaker layer by layer when we get full bottom covered with molecules then we find thickness of the layer and estimate no. of atoms in layer with the help of different methods and the we divide it with estimated no. of atoms this way we find the diameter of atoms or molecule then we just divide it by 2.

more precisely scientist take extreme precautions while performing the above experiments.