Deuterium is an isotope of hydrogen containing a proton and neutron in its nucleus, while normal hydrogen has only a proton.
You have the atom, which has the neutron, the electron, the proton.
At any rate I do know that the atom called “hydrogen” is formed by just one proton and one electron.
But natural matter does have a tendency to let the electron fall into the proton.
This must be called their proton pseudos, if associationism pure and simple is to be accepted.
Yet—the proton is positive and attracts the electron's negative charge.
Scintillation counters at A and B record the passage of a proton, thus defining its direction.
One kind of speck is called “electron” and the other kind “proton.”
Then they would be just about as far apart but the smaller one would be the proton.
The PDP-9 first tries to reconstruct a vertex from the proton trajectories.
1920 in physics, coined by English physicist Ernest Rutherford (1871-1937) from noun use of Greek proton, neuter of protos "first" (see proto-), on analogy of electron; supposedly because hydrogen was hypothesized as a constituent of all the elements. The word was used earlier in embryology (1893) as a translation of German anlage ("fundamental thing") based on Aristotle's phrase he prote ousia to proton.
proton pro·ton (prō'tŏn')
A stable, positively charged subatomic particle in the baryon family having a mass 1,836 times that of the electron.
A stable subatomic particle in the baryon family having a mass of 1.672 × 10-24 grams (1,836 times that of the electron) and a positive electric charge of approximately 1.602 × 10-19 coulombs. Protons make up part of the nucleus of all atoms except hydrogen, whose nucleus consists of a single proton. In neutral atoms, the number of protons is the same as the number of electrons. In positively charged atoms, the number of protons is greater than the number of electrons, and in negatively charged atoms electrons outnumber protons. Protons are believed to be composed of two up quarks and one down quark. See Table at subatomic particle.