Question

as the atomic model developed, protons, neutrons and electrons were discovered. what is the correct order of discovery? first second third a proton neutron electron b proton electron neutron c electron proton neutron d electron neutron proton

Explanation:

Electrons were discovered first in 1897 by J. J. Thomson. Protons were discovered next, with Ernest Rutherford's experiments in 1911 - 1919 leading to their identification. Neutrons were discovered last by James Chadwick in 1932.

Answer:

C. Electron, Proton, Neutron