Question
A nuclide has a half-life of 1.91 y. Its decay constant has a numerical value of (a) $1.32 ;$ (b) $2.76 ;$ (c) 0.363 (d) $0.524 ;$ (e) none of these.
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91 years. The half-life is the time taken for half of the nuclide to decay. Show more…
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A nuclide has a half-life of 1.91 years. Its decay constant has a numerical value of $(\text { a) } 1.32 ; \text { (b) } 2.76$ (c) $0.363 ;$ (d) $0.524 ;$ (e) none of these.
A nuclide has a decay rate of $2.00 \times 10^{10} \mathrm{s}^{-1}$. After 25.0 days, its decay rate is $6.25 \times 10^{8} \mathrm{s}^{-1}$. What is the nuclide's half-life? (a) 25.0 d; (b) 12.5 d; (c) 50.0 d; (d) $5.00 \mathrm{d} ;$ (e) none of these.
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Nuclear Physics
Nuclear Stability and Radioactivity
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