52_100_Lecture_4_F07

52_100_Lecture_4_F07 - Predicting Product of Nuclear Decay...

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9/5/2007 1 Predicting Product of Nuclear Decay 85 36 Kr ? + 0 -1 e 222 4 H R 86 ? 2 He + Rn 239 92 U ? + 0 -1 e 11 5 B 7 3 Li + ? 1 ? 140 56 Ba + 0 -1 e Predicting Stability If the ratio of an isotopes neutrons to its protons is approximately 1.5 : 1 or less, then the isotope is stable Isotope Neutrons Protons Ratio Stable? 0 1 0:1 Yes 1 1 1:1 Yes 2 1 2:1 No 1 1 H 2 1 H 3 1 H 2
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