Be sure to answer all parts. The radioactive decay of thallium−206 to lead−206 has a half-life of 4.20 min. Starting with 5.50 × 1022 atoms of thallium−206, calculate the number of such atoms left after 42.0 min.Enter your answer in scientific notation. × 10 atoms |
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Be sure to answer all parts. The radioactive decay of thallium−206 to lead−206 has a half-life...
The radioactive decay of thallium−206 to lead−206 has a half-life of 4.20 min. Starting with 5.30 × 1022 atoms of thallium−206, calculate the number of such atoms left after 42.0 min. Enter your answer in scientific notation.
Be sure to answer all parts. 90Sr.( The half-life of strontium-90 is 29.1 years. Calculate the radioactivity in millicuries of 16.4 mg of 90Sr = 89.908 g/mol) Enter your answer in scientific notation. X 10! mCi
Radioactive Decay - Half-life and Activity 1 Radioactive decay - Half-life Time 0 1000 21 31 750 N 1.000.000 500,000 250,000 125,000 62,500 31.250 15.625 7813 3.506 1.953 977 51 6 500 7 BI . 101 250 125 0 tie 21.234.41516171819, 1012 Time in multiples of A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour - 60 minutes, 1 minute = 60 seconds (a) Find its decay constant in year...
210Pb (lead-210) is the longest lived radioactive isotope of lead, and has a half-life of 22.3 years. a. Calculate the binding energy of 210Pb. b. 210Pb undergoes a beta deacay. Write the decay equation, and calculate the energy released in the reaction. c. After 10 years, what percentage of the starting amount of 210Pb has decayed?
Be sure to answer all parts. The carbon-14 decay rate of a sample obtained from a young tree is 0.264 disintegration per second per gram of the sample. Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of 0.193 disintegration per second per gram of the sample. What is the age of the object? (The half-life of carbon-14 is 5715 years.) × 1 ol 1 years Enter your answer in scientific notation.
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Be sure to answer all parts 206 Determine the age of rock that contains 41.7 mg of23*U and 3.93 mg of20'Pb. of 238U 4.51 x 109 yr) (1/2 Enter your answer in scientific notation. 9 x 10 15.3 yr
2 attempts left Check my work Be sure to answer all parts. Determine the number of carbon atoms in 1.00 kg of carbon dioxide. X 10 atoms (Enter your answer in scientific notation.) Determine the number of oxygen atoms in 1.00 kg of carbon dioxide. x 10 atoms (Enter your answer in scientific notation.) Calculate the mass of potassium nitrate that contains 1.00 mol of oxygen atou References eBook & Resources Multipart Answer
The half-life for the radioactive decay of C−14 is 5730 years. A) How long will it take for 30% of the C−14 atoms in a sample of C−14 to decay? B) If a sample of C−14 initially contains 1.9 mmol of C−14, how many millimoles will be left after 2280 years?
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.
Be sure to answer all parts. Calculate the number of atoms in 0.0903 mol of fluorine gas. Enter your answer in scientific notation. ×10 atoms