Has anyone tried the Cavendish balance experiment with hydrogen liquid?

Question

He used lead and others have used iron. Hydrogen is different as it has no (mostly no) neutrons. Has anyone tried to make a balance like his with hydrogen liquid? Neutrons are assumed to not act at a distance. But probably only because of the extreme difficulty of getting a neutron to stay still, long enough to measure it's attractiveness to other particles at a distance. One neutron can attract to more than one proton.

gus_massa · Accepted Answer

You expect that repeating the experiment with Hydrogen will produce a value of G that is smaller or greater than the value of G obtained with lead?
Neutrons don't act at distance with the electric force, because they don't have electric charge.
They act at distance with the gravitational force, because they have mass.
For example, you can fill a glass with heavy water that has Deuterium instead of Hydrogen. https://en.wikipedia.org/wiki/Heavy_water
The number of molecules is almost equal, because the "size" of the molecule does not depend on the number of neutrons (almost). But the mass and the weigh will increase like a 10% because now there are more neutrons in the glass. The neutrons are acting at distance with the Earth, so the weight measure with an usual balance is greater.

ohiovr · Answer

Anyway I got my answer. The answer is, no one has done it, and people are too arrogant to try it because they seem to think stars can exist without neutrons, even with never having being to any star in the universe and examining even one of their contents.