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 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?
The element does, however, have a very long half-life (7.92 billion years, or 7.92E9 years). If a Stone originally contained 6.52E24 atoms of the unknown element when it formed during the Big Bang, how many atoms does it contain now, 13.8 billion years later (13.8E9 years)? 1.43E24 atoms 9.96E23 atoms 2.14E24 atoms 3.65E24 atoms 1.95E24 atoms 1-137, with 53 protons, undergoes beta minus decay. The daughter atom then undergoes beta minus decay again. Which of the following is the second...