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Alpha particle, positively charged particle, identical to the nucleus of the helium-4 atom, spontaneously emitted by some radioactive substances, consisting of two protons and two neutrons bound together, thus having a mass of four units and a positive charge of two. Calculate the mass defect and binding energy per nucleon for an alpha particle (containing two protons and two neutrons) whose actual mass is 4.0028 amu (mass of proton = 1.00759 amu, mass of nuetron = 1.00898 amu). Alpha Particle, alternatively known as Alpha Ray or Alpha Radiation, is a particle that is positively charged emitted when radioactive materials are decayed. The reason behind the mass of the alpha particle is the bonding between its two protons and two neutrons. In this article, we will learn more about the mass of the alpha particles, their properties, and their uses. Alpha Decay produced alpha particles. Its mass is due to two protons and two Neutrons bonding. Alpha particle is very similar to the Helium nucleus. Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium-4 nucleus. Alpha particle is named after the first letter in the Greek alphabet (α).
