Tritium, which is , has a half-life of 12.3 years. Calculate the amount of time it would take for 31?a number of tritium atoms in a sample to drop by a factor of 16.
1) Tritium, which is , has a half-life of 12.3 years. Calculate the amount of time it would take for 31?a number of tritium atoms in a sample to drop by a factor of 16.
2)Phosphorus-32 has a half-life of 14.3 days. If, at time zero, a sample containing phosphorus-32 as the only radioactive isotope was decaying at a rate of 16,384 disintegrations per second, what would the decay rate be after 28.6 days?
3)Calculate the ½-life of iodine-131, which is used in the treatment of thyroid cancer, if a 256-nanogram sample of iodine-131 has decreased to 16.0 ng in 32.08 days.
4)The carbon-14/carbon-12 ratio in living tissue is 1.35(10-12). About how old is a fossil if the carbon-14/carbon-12 ratio in the fossil is 1.69(10-13)?
Step by step
Solved in 2 steps with 2 images
