This is precisely the difference between the new, smaller, dimension of the proton, the nucleus of the hydrogen atom, and the value ... as Planck's constant or the mass of the electron can only ...

Physicists in the US claim to have used a transmission electron microscope (TEM) to see a single hydrogen atom – the first time that a TEM has been used to image such a light atom. The breakthrough ...

Generally, transition metal catalysts are essential for the reductive hydrogen atom transfer reaction, which is also known as the transfer hydrogenation reaction or the borrowing-hydrogen reaction.