If protons have a half-life of 10^31 years, what fraction of the original protons have decayed during the 10^11 year existence of the universe?
If protons have a half-life of 10^31 years, what fraction of the original protons have decayed...
If carbon-14 has a decay half-life of 5730 years, what fraction of the original carbon-14 would you expect to remain intact in a 3000 year old parchment scroll, and why?
If C14 has a half-life of 4,000 years, what fraction will be remaining after 36,000 years? IfI 131 has a half-life of 8 days, what fraction will be left after a year?
The half-life of a drug in the bloodstream is 18 hours. What fraction of the original drug dose remains in 48 hours? in 60 hours?
The isotope 143Pr undergoes beta decay with a half-life of 13.57 days. What fraction of 143Pr has decayed after 11.6 days?
Fluorine-21 has a half-life of approximately 5 seconds. What fraction of original nuclei would remain after 1 minute?
The half-life of Carbon-14 is 5,730 years. What is the probability that a randomly selected Carbon-14 atom will not yet have decayed in 4,000 years’ time?
13) Fluorine-21 has a half-life of approximately 5 seconds. What fraction of original nuclei would remain after 1 minute? (6 points)
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?
After 42 days a sample of phosphorus-32 has decayed 3 times. What is the half-life of phosphorus-32? (5 pts.)
the half-life of Sr-90 is 29 years. what fraction if the atoms in a sample Sr-90 would remain 175 years later?