v Details 1. A Geiger counter measures the activity of a sample of a particular radioisotope to be 160 counts per minute. Eight hours later, the detector measures 10 counts per minute for the same sample. what is the half-life of the sample? (~ 2 hours) 2. How many atoms are in a 1 gram sample of Sodium-24? (~ 2.5 * 1022 atoms) 3. How many radioactive decays happen in one day for the following two samples: 1. One gram of Iodine-131, given that the half-life of the sample is 8 clays (~3.8 * 1020 atoms will decay) 2. One gram of Tritium (Hydrogen-3), given that the half-life of the sample is 12 years (~3.99 * 1019 atoms will decay)