Which sub-atomic particle was discovered by J Chadwick?

Thee correct answer is Neutron.​Key Points

• James Chadwick achieved a breakthrough in nuclear research in 1932 when he confirmed the existence of neutrons, which are elementary particles that have no electrical charge.
• The neutron is a subatomic particle with the symbol n or n⁰ and a mass slightly more than that of a proton. It has a neutral charge (no positive or negative charge).

Important Points

• A proton is a stable subatomic particle with a positive electric charge of +1e elementary charge and the sign p, H⁺, or ¹H⁺.
• A neuron, also known as a nerve cell, is an electrically excitable cell that communicates with other cells through synapses, which are specialised connections between cells.
• Electron, lightest stable subatomic particle known. It carries a negative charge of 1.6 × 10⁻¹⁹ coulomb, which is considered the basic unit of electric charge. The rest mass of the electron is 9.1 × 10⁻³¹ kg, which is only 1/1836 of the mass of a proton. An electron is therefore considered nearly massless in comparison with a proton or a neutron, and the electron mass is not included in calculating the mass number of an atom.