Which particle is free of charge ?
[66th BPSC Re-exam]
1) alpha particle
2) electron
3) neutron
4) proton
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Alpha particles carry a positive charge, beta particles carry a negative charge, and gamma rays are neutral. An alpha particle is made up of two protons and two neutrons bound together. Beta particles are high energy electrons. Gamma rays are waves of electromagnetic energy, or photons.
3) neutron