Who discovered the proton he and proposed what structural model of the atom diagram

As shown in the figure is a schematic diagram of the nuclear structure model of the atom first proposed by Rutherford,

From the figure can be seen: the atom is composed of the nucleus and electrons, the nucleus consists of neutrons and protons; protons and neutrons are composed of smaller particles quarks.

So the answer is: Rutherford; electrons; quarks.