Sr-90 has a half-life of 29.1 years. How long will it take for the activity of...
The half life of cobalt 60 is 5.3 years. How long will it take a 4.8g sample of Co60 to decay until only 1.6g of Co60 remains in the sample?
Create a chart to work this problem. Sr-90 has a half-life of 29.1 yr. How many yrs. from now will the first half-life be completed? the second half-life? the third half life?
The Strontium-90 isotope has a half-life of 28.1 years. Supposed we used a .10 Curie sample of Sr-90. That is, we used enough Sr-90 to have an activity of .10 Ci (1 Ci=3.7x1010 disintegrations/second) Calculate the activity of this sample when used by students 281 years from now.
The half-life for the radioactive decay of C-14 is 5730 years. How long will it take for 25% of the C-14 atoms in a sample of C-14 to decay. If a sample of C-14 initially contains 1.5 mmol of C-14, how many mmols will be left after 2255 years.
A certain radioactive nuclide has a half life of 44.3 years. How long does it take for 87.5% of a sample of this substance to decay? years
the half-life of Sr-90 is 29 years. what fraction if the atoms in a sample Sr-90 would remain 175 years later?
A certain radioactive nuclide has a half life of 50.7 years. How long does it take for 87.5% of a sample of this substance to decay? years Submit Hide Hints Hint 1 Hint 4 Hint 3 Hint 2 What percentage of the original sample has decayed after two half lives have elapsed?
A certain radioactive nuclide has a half life of 74.8 years. How long does it take for 87.5% of a sample of this substance to decay? ___years?
Phosphorus-32, a radioisotope used in leukemia therapy, has a half-life of 14.26 days. How long will it take for a sample of 32P to decay to 18.3% of its original activity? O 3.5 days 4.2 days 15 days 35 days O 17.5 days
Isotope X has a half-life of 9.30 years. How long will it take for a 51.4 mg sample of X to decay to 0.415 mg? 69.1 Years 20.1 Years O 61.5 Years 0 64.7 Years O 89.0 Years