Drop a chunk of pure sodium in water, for example ... have to know about sodium is that, on an atomic level, it has just one more proton and one more electron than an inert, noble gas: neon.

The researchers, from the University of Cambridge, designed a method to better control the behavior of a cloud of atomic nuclei in ... laser beams and a single electron, however, the physicists ...

Over the past few decades, the atomic mass of the electron has been determined using ... trap to compare the cyclotron frequencies of a cloud of electrons with that of protons, which were ...