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Which particle has a negative charge?
Question

Which particle has a negative charge?

A.

Proton

B.

Neutron

C.

Electron

D.

Positron

Correct option is C

The correct answer is (c) Electron

Explanation:

  • An electron is a subatomic particle that carries a negative charge. It orbits the nucleus of an atom and is involved in chemical reactions and electricity.
  • The negative charge of an electron is equal in magnitude but opposite in sign to the positive charge of a proton.
  • Electrons play a crucial role in the formation of ions and the electrical properties of matter.

Information Booster:

  • Electrons are fundamental particles found in atoms, along with protons and neutrons. They have a mass approximately 1/1836th of that of a proton and are essential for the chemical properties of elements.
  • The charge of an electron is exactly -1.602 × 101910^{-19}​ Coulombs, which is a standard value.
  • Electrons are located in electron clouds or orbitals around the nucleus, which contains protons and neutrons.
  • Discovered by J.J. Thomson in 1897​
  • The behavior of electrons is described by quantum mechanics, which governs their movement, interaction with light, and ability to form bonds with other atoms.

Additional Knowledge:

Proton:

  • Discovered by Ernest Rutherford in 1917.
  • A proton is a positively charged particle found in the nucleus of an atom. Its charge is +1.602 × 101910^{-19}​ Coulombs, which is the opposite of the electron's negative charge. Protons, together with neutrons, make up most of the mass of an atom.

Neutron:

  • A neutron is a neutral particle, meaning it carries no charge. Discovered by James Chadwick in 1932.
  • It is found in the nucleus of an atom and has a mass roughly equal to that of a proton.
  • Neutrons play a vital role in stabilizing the nucleus by balancing the repulsive forces between positively charged protons.

Positron:

  • A positron is the antimatter counterpart of the electron.
  • Theoretical Prediction: Paul Dirac (1928)
  • Experimental Discovery: Carl Anderson (1932)
  • It carries a positive charge and has the same mass as an electron.
  • When a positron encounters an electron, they annihilate each other in a process known as pair annihilation, releasing energy in the form of gamma rays.

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