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5. A sample with 4.0x10'15 atoms has an activity of 3.50x 1012 Bq. It has a...
5. A sample with 4.0x 1015 atoms has an activity of 3.50 1012 Bq. It has...
5. A sample with 4.0x 1015 atoms has an activity of 3.50 1012 Bq. It has a half-life of 600 years (a) How much is the decay constant? (2 marks) (b) How much time will it take to drop to one-quarter of its original amount? (2 marks)
ivity of 3.50 10 Bq. It has a half-life of Asample with 4.0×1015 atoms has an...
ivity of 3.50 10 Bq. It has a half-life of Asample with 4.0×1015 atoms has an acti 600 years 5. (a) How much is the decay constant? (2 marks (b) How much time will it take to drop to one-quarter of its original amount? (2 marks)
What's this nuclide's half-life? A radioactive sample containing 1.20×1017 nuclei has activity 2.45×1012 Bq .
What's this nuclide's half-life? A radioactive sample containing 1.20×1017 nuclei has activity 2.45×1012 Bq .
A sample of radioactive material contains 1.1E15 atoms and has an activity of 6.3E11 Bq. What...
A sample of radioactive material contains 1.1E15 atoms and has
an activity of 6.3E11 Bq. What is its half-life?
A sample of radioactive material contains 1.1 x 1015 atoms and has an activity of 6.3 x 1011 Bq. What is its half-life? 1.16E3 X Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to...
Constants and Conversion Factors 1 Bq - 1 decay/s 1 Ci 3.7 x 101°Bq Avogadro's number...
Constants and Conversion Factors 1 Bq - 1 decay/s 1 Ci 3.7 x 101°Bq Avogadro's number Number of atoms per mole 6.023 x 1023 4) If you have 2 x 1012 atoms of 131Cs, what will the activity be after 50 years? Half life of 137Cs is about 30 years. 6.205E-9 Bq Submit Help Your submissions: 6.205E-9 x Computed value: 6.205E-9Submitted: Sunday, July 8 at 6:49 PM Feedback: 5) How much activity will there be in 137Cs after 50 years...
A sample of radioactive material is initially found to have an activity of 114 Bq. After...
A sample of radioactive material is initially found to have an activity of 114 Bq. After 4 days and 5 hours, the activity of the sample is found to be 85 Bq. 1) Calculate the disintegration constant of this material. 1 = 51 Submit 2) Calculate the half-life of the material. T12- days Submit 3) How long from the beginning (when the activity was 114 Bq) did it take for the sample to reach an activity of 10 Bq? t...
12. A radioactive sample takes 3.5 minutes to reduce its activity from 2.0 10 Bq to...
12. A radioactive sample takes 3.5 minutes to reduce its activity from 2.0 10 Bq to 7.5-10 Bq. Calculate the half life of the sample. [2 marks]
What is the activity of the sample in Bq? Cobalt-60, which undergoes beta decay, has a...
What is the activity of the sample in Bq?
Cobalt-60, which undergoes beta decay, has a half- life of 5.26 yr. N = 3.14x1013 B-particles SU Previous Answers All attempts used; correct answer displayed Part B What is the activity of the sample in Bq? t V AC o XD x x x XI .X.10 > . Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining
The Cadmium isotope 109Cd is radioactive. A sample begins decay with 1012 Cd atoms. After 500...
The Cadmium isotope 109Cd is radioactive. A sample begins decay with 1012 Cd atoms. After 500 days, 4.7 x 1011 atoms remain. What is the half-life of this sample? (a) 46 days (b) 102 days (c) 459 days -- right answer but not sure how to get it (d) 662 days (e) none of the above
A sample has a C614 activity of 0.0089 Bq per gram of carbon. (a) Find the...
A sample has a C614 activity of 0.0089 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have been as much as 44% larger. Repeat part (a), taking into account this 44% increase.
5. A sample with 4.0x 1015 atoms has an activity of 3.50 1012 Bq. It has a half-life of 600 years (a) How much is the decay constant? (2 marks) (b) How much time will it take to drop to one-quarter of its original amount? (2 marks)
ivity of 3.50 10 Bq. It has a half-life of Asample with 4.0×1015 atoms has an acti 600 years 5. (a) How much is the decay constant? (2 marks (b) How much time will it take to drop to one-quarter of its original amount? (2 marks)
A sample of radioactive material contains 1.1E15 atoms and has
an activity of 6.3E11 Bq. What is its half-life?
A sample of radioactive material contains 1.1 x 1015 atoms and has an activity of 6.3 x 1011 Bq. What is its half-life? 1.16E3 X Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to...
Constants and Conversion Factors 1 Bq - 1 decay/s 1 Ci 3.7 x 101°Bq Avogadro's number Number of atoms per mole 6.023 x 1023 4) If you have 2 x 1012 atoms of 131Cs, what will the activity be after 50 years? Half life of 137Cs is about 30 years. 6.205E-9 Bq Submit Help Your submissions: 6.205E-9 x Computed value: 6.205E-9Submitted: Sunday, July 8 at 6:49 PM Feedback: 5) How much activity will there be in 137Cs after 50 years...
A sample of radioactive material is initially found to have an activity of 114 Bq. After 4 days and 5 hours, the activity of the sample is found to be 85 Bq. 1) Calculate the disintegration constant of this material. 1 = 51 Submit 2) Calculate the half-life of the material. T12- days Submit 3) How long from the beginning (when the activity was 114 Bq) did it take for the sample to reach an activity of 10 Bq? t...
12. A radioactive sample takes 3.5 minutes to reduce its activity from 2.0 10 Bq to 7.5-10 Bq. Calculate the half life of the sample. [2 marks]
What is the activity of the sample in Bq?
Cobalt-60, which undergoes beta decay, has a half- life of 5.26 yr. N = 3.14x1013 B-particles SU Previous Answers All attempts used; correct answer displayed Part B What is the activity of the sample in Bq? t V AC o XD x x x XI .X.10 > . Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining
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