Correct option is C
The correct answer is (c) 1932
Explanation:
- James Chadwick, a British physicist, discovered and proved the existence of the neutron in 1932 through his experiments on beryllium bombardment with alpha particles.
- This discovery was crucial in understanding atomic structure and led to significant advancements in nuclear physics, including the development of nuclear reactors and atomic bombs.
Information Booster:
Neutron Properties:
- It is a neutral subatomic particle (i.e., has no electric charge).
- Its mass is slightly greater than that of a proton.
- It plays a key role in nuclear reactions and radioactivity.
Recognition:
James Chadwick was awarded the Nobel Prize in Physics in 1935 for his discovery of the neutron.
Table of electrons and protons:
Property | Electron (e⁻) | Proton (p⁺) |
Discovery | J.J. Thomson (1897) | E. Goldstein (1886) & Rutherford (1917) |
Charge | -1 (Negative) | +1 (Positive) |
Mass | 9.109×10−319.109 \times 10^{-31}9.109×10−31 kg | 1.673×10−271.673 \times 10^{-27}1.673×10−27 kg (approx. 1836 times the mass of an electron) |
Location | Outside the nucleus (in energy levels) | Inside the nucleus |
Movement | Moves around the nucleus in orbits or orbitals | Fixed inside the nucleus |
Role in Atom | Involved in chemical bonding and electricity conduction | Determines the identity of an element (Atomic Number) |
Symbol | e⁻ | p⁺ |
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