bn:00003048n
Noun Concept
Categories: Radioactivity, Helium, Ionizing radiation
EN
alpha particle  alpha radiation  Helium nucleus  A-particle  A-particles
EN
A positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes WordNet 3.0
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EN
A positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes WordNet 3.0 & WordNet 2020
Alpha particles, also called alpha rays or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a helium-4 nucleus. Wikipedia
Helium-4 nucleus; a particle consisting of two protons and two neutrons bound together Wikidata
A stream of alpha particles which are ejected from many radioactive substances having a penetrating power of a few cm in air but can be stopped by a thin piece of paper. OmegaWiki
A positively charged nucleus of a helium-4 atom (consisting of two protons and two neutrons), emitted as a consequence of radioactivity; α-particle. Wiktionary
Positively charged nucleus. Wiktionary (translation)