Lecture Notes on Natural Radioactivity

Lecture Notes on Natural Radioactivity - Lecture Notes...

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Lecture’Notes ’ Natural’Radioactivity ’ Radioactivity’ The’spontaneous’emission’of’particles’or’energy’from’an’atomic’nucleus’as’it’ disintegrates’ Discovered’in’1896’by’Henri’Becquerel,’a’French’scientist’who’was’very’ interested’in’the’recent’discovery’of’X -rays.’ Alpha,’beta,’and’gamma ’ Alpha’ o Known’to’be’the’nucleus’of’a’helium’atom,’that’is,’two’protons’and’ two’neutrons ’ Beta’ ’ o High-energy’electrons ’ Gamma’ o Electromagnetic’radiation,’as’is’light,’but’very’short’wavelength Nuclear’Equations ’ Two’main’subatomic’particl es’in’the’nucleus;’the’proton’and’the’neutron The’protons’and’the’neutrons’are’called’nucleons Example:’ A’plutonium -242’nucleus’undergoes’radioactive’decay,’emitting’an’alpha’ particle.’Write’the’nuclear’ equation’for’this’nuclear’reaction.
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