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

The correct answer is Proton.

Explanation:

A proton is a subatomic particle with a positive electrical charge that found in the nucleus of an atom. The particle has an opposite and equal to that of the electron.

Rutherford discovered these positive charge particles and termed as a proton for the first time. The total number of protons in an element's nucleus is considered as the atomic number.

Thus, the correct answer is Proton.

really dont know just need some points