Difference between revisions of "Alpha particle"
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An '''alpha particle''' is a positively charged [[particle]] (a [[Helium-4]] [[nucleus]]) made up of two [[neutron]]s and two [[proton]]s. It is the least penetrating of the three common forms of [[radiation]], being stopped by a sheet of paper. It is not dangerous to living things unless the alpha-emitting substance is inhaled or ingested or comes into contact with the [[lens]] of the [[eye]].<ref>''Glencoe Physics, Principles and Problems, Teacher Edition''.</ref> | An '''alpha particle''' is a positively charged [[particle]] (a [[Helium-4]] [[nucleus]]) made up of two [[neutron]]s and two [[proton]]s. It is the least penetrating of the three common forms of [[radiation]], being stopped by a sheet of paper. It is not dangerous to living things unless the alpha-emitting substance is inhaled or ingested or comes into contact with the [[lens]] of the [[eye]].<ref>''Glencoe Physics, Principles and Problems, Teacher Edition''.</ref> | ||
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[[Category:Subatomic Particles]][[Category:Radioactivity]][[Category:Physics]] | [[Category:Subatomic Particles]][[Category:Radioactivity]][[Category:Physics]] | ||
Latest revision as of 11:50, April 12, 2017
An alpha particle is a positively charged particle (a Helium-4 nucleus) made up of two neutrons and two protons. It is the least penetrating of the three common forms of radiation, being stopped by a sheet of paper. It is not dangerous to living things unless the alpha-emitting substance is inhaled or ingested or comes into contact with the lens of the eye.[1]
References
- ↑ Glencoe Physics, Principles and Problems, Teacher Edition.