What does Alpha particle mean?

Alpha particle meaning in General Dictionary

a particle emitted at high velocity from certain radioactive substances its exactly the same as the helium nucleus comprising two protons and two neutrons Rays of these particles are known as alpha rays

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  • a positively recharged particle that is the nucleus for the helium atom; emitted from all-natural or radioactive isotopes

Alpha particle meaning in Medical Dictionary

A tiny mass of product made up of two protons and two neutrons.

Alpha particle meaning in Chemistry Dictionary

A helium nucleus.