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'''Alpha decay''' is the process by which the [[nucleus]] of an [[atom]] emits a package of two [[proton]]s and two [[neutron]]s, that is, an "alpha particle".<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref>
'''Alpha decay''' is the process by which the [[nucleus]] of an [[atom]] emits a package of two [[proton]]s and two [[neutron]]s, that is, an "alpha particle".<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> Put another way, alpha decay is nuclear decay by emission of an alpha particle (<sup>4</sup>He nucleus).
It is one of three major types of [[radioactivity]] (the other two being [[beta decay]] and [[gamma decay]]). Alpha decay is most common in atoms with a [[mass number]] greater than 60.
It is one of three major types of [[radioactivity]] (the other two being [[beta decay]] and [[gamma decay]]). Alpha decay is most common in atoms with a [[mass number]] greater than 60.