8. What is the activity of Igram of radium-226? Х = The activity is given as the product 2N, where 2 is the decay consta
Posted: Wed May 18, 2022 5:15 pm
- 1 (47.22 KiB) Viewed 39 times
8. What is the activity of Igram of radium-226? Х = The activity is given as the product 2N, where 2 is the decay constant and N nuclei that decay. Given that are sample is radium-226, with a half-life of 1 0.693 0.693 lyr calculate the decay constant. a = = 1.35 t. 1600 yrs 3.2x10 sec To calculate the number of nuclei present we use the mass given, 1g. There radium per mole and in 1 mole there are 6.02x1023 nuclei. Thus in 1 g there nuclei. The activity is therefore 2N = (1.35x10-' sec ')(2.66x102' nuclei) = 3 decays/sec = 3.6x100 Bq. -