State true or False.
Electron was discovered by Goldstein.

Hint: Electrons are the negatively charged particles of an atom. Together all the electrons of an atom contribute to a negative charge that balances the positive charge of the protons in the atomic nucleus. The mass of an electron is almost 1000 times smaller than the mass of a proton.

Complete answer:
During the 1880s and 90s scientists carried out extensive research in cathode rays for the carrier of the electrical properties in matter. Their work culminated in the discovery of the electron by English Physicist J.J. Thomson in 1897. Thus, in the year 1897 electrons were discovered by J.J. Thomson.
Hence the given statement “Electron was found by Goldstein is False”.

The true statement is Electron was discovered by Thomson.

Additional Information:
An electron is a negatively charged subatomic particle. In electrical conductors, current flow which is the results from the movement of electrons from negative to positive terminal of the battery. In semiconductor materials, current also occurs as a movement of electrons.

Note: There are three subatomic particles: Electrons, Protons and Neutrons. Electrons were discovered by J.J. Thomson. Protons were discovered by Rutherford and Neutrons were discovered by James Chadwick.