Rutherford coined the term used for the simplest positive charged particle and called it the:

Rutherford coined the term protons and is positively charged particle present inside the nucleus of the atom. It has its own mass and is slightly less than the mass of the neutron.

Explanation:

It is believed that the protons are made up of 2 up quarks and 1 down quark. It helps to bind the nucleus together. It attracts negatively charged particle called as electron towards itself. Electrons are arranged in the orbit of the atom.