Flashcards
Half life
Cards in this deck (11)
- 1What will an unstable nuclei do to become stable?Spontaneously emit radiation
- 2What rates do isotopes decay at?Different rates
- 3Which isotopes have higher activities?Those which decay more often
and more of the N nuclei which decay per second - 4What happens to the decay rate if we have a larger sample of the same substance?There are more measurable decays per second due to the larger number of unstable nuclei
- 5What is their a proportionality between in terms of decay?Activity and number of decays
(or change in number of unstable nuclei) - 6what is the decay constant?The proportionality of an individual nuclei decaying per second
- 7What are the units of decay constant?S^-1
- 8On average what is the time taken for half of the nuclei in a sample to randomly decay?Constant
- 9What is the time taken independent of?The initial number
- 10What does the theory of the exponential nature of decay indicate?That a sample will never fully decay
- 11In practice what will actually happen?The sample will eventually decay completely and its count rate will drop below the background count
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- Physics unit 5 Flashcards on Half life, created by sammy414 on 18/02/2014.
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- sammy414
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