Which subatomic particle was discovered by J. Chadwick in 1932?
Show answer & explanation
Correct answer: C
Explanation
Correct Answer: Option 3 (Neutron)
Explanation:
In 1932, British physicist James Chadwick discovered the neutron. He bombarded beryllium with alpha particles and found that a new radiation was being emitted, consisting of particles with no electrical charge. These neutral particles had a mass approximately equal to that of protons, and he named them neutrons. He was awarded the Nobel Prize in 1935 for this important discovery.
Discovery of Other Major Particles
Electron: Discovered by J.J. Thomson in 1897 through cathode ray experiments.
Proton: Credit for its discovery goes to Ernest Rutherford (1917-1919), although Goldstein had already identified anode rays.
Atomic Nucleus: Rutherford discovered the nucleus in 1911 through his famous gold foil experiment.
Possible Questions for the Upcoming Exam
Which particle in an atom has no charge?
(Answer: Neutron)
The mass of an atom is equal to the sum of which particles?
(Answer: Proton + Neutron)
What charge does an electron have?
(Answer: Negative Charge)