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Carbon (Z = 6) with mass number 11 decays to boron (Z = 5). (a) Is it a β+ -decay or a β− -decay? (b) The half-life of the decay scheme is 20.3 minutes. How much time will elapse before a mixture of 90 % carbon - 11 and 10% boron - 11 (by the number of atoms ) converts itself into a mixture of 10% carbon - 11 and 90 % boron - 11 ? |
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Answer» Carbon (Z = 6) with mass number 11 decays to boron (Z = 5). (a) Is it a β+ -decay or a β− -decay? (b) The half-life of the decay scheme is 20.3 minutes. How much time will elapse before a mixture of 90 % carbon - 11 and 10% boron - 11 (by the number of atoms ) converts itself into a mixture of 10% carbon - 11 and 90 % boron - 11 ? |
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