Question

which subatomic particle was discovered first? select the correct answer below: proton neutron electron they were discovered simultaneously

Explanation:

The electron was the first sub - atomic particle to be discovered. J.J. Thomson discovered the electron in 1897 through his experiments with cathode - ray tubes. Protons were discovered later by Ernest Rutherford, and neutrons were discovered by James Chadwick even later.

Answer:

C. electron