Ci, given that the curie was originally Quiz
The question sheet
Reveal any answer as you study-
The curie was originally supposed to be exactly the activity of what?
- A gram of potassium
- A gram of uranium
- A gram of thorium
- A gram of radium
Reveal answer
Answer: A gram of radium
Source evidence
PDF page 1526: supposed to be exactly the activity of a gram of radium.
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What is the activity found in 1.00 g of living tissue?
- 4140 Bq
- 3500 Bq
- 1.00 Bq
- 0.250 Bq
Reveal answer
Answer: 0.250 Bq
Source evidence
PDF page 1526: in 1.00 g of found in living tissue is 0.250 Bq.
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According to the source, what mass of thorium does an average lantern mantle contain?
- 1.00 g
- 50.0 g
- 2.00 g
- 300 mg
Reveal answer
Answer: 300 mg
Source evidence
PDF page 1526: it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100% , with a half-life of . If an average lantern mantle contains 300 mg of thorium, what is its activity?
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What property of thorium's oxide is described in the source?
- It survives heating to incandescence
- It emits beta particles
- It glows in the dark
- It dissolves in water
Reveal answer
Answer: It survives heating to incandescence
Source evidence
PDF page 1526: it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100% , with a half-life of . If an average lantern mantle contains 300 mg of thorium, what is its activity?
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Reactor leakage checks test for as little as what activity per liter?
- 3500 Ci
- 1.00 pCi
- 15.0 Ci
- 1.00 Bq
Reveal answer
Answer: 1.00 pCi
Source evidence
PDF page 1526: tested for as little as 1.00 pCi of per liter, to check for possible reactor leakage. What mass of has this activity?
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In one problem, 1.00 mg of a scarce isotope has an activity of what value?
- 1.75 Bq
- 0.250 Bq
- 4140 Bq
- 80.0 Bq
Reveal answer
Answer: 80.0 Bq
Source evidence
PDF page 1526: uranium. If a researcher isolates 1.00 mg of the relatively scarce and finds this mass to have an activity of 80.0 Bq, what is its half-life in years? 52. has one of the longest known radioactive half-lives. In a difficult experiment, a researcher found that the activity of 1.00 kg of is 1.75 Bq. What is the half-life in years?
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The activity of 1.00 kg of an isotope with a very long half-life is given as what?
- 80.0 Bq
- 3500 Ci
- 4140 Bq
- 1.75 Bq
Reveal answer
Answer: 1.75 Bq
Source evidence
PDF page 1526: uranium. If a researcher isolates 1.00 mg of the relatively scarce and finds this mass to have an activity of 80.0 Bq, what is its half-life in years? 52. has one of the longest known radioactive half-lives. In a difficult experiment, a researcher found that the activity of 1.00 kg of is 1.75 Bq. What is the half-life in years?
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A decay rate of 4140 Bq in a person relates to which element in the body?
- Radium
- Thorium
- Uranium
- Potassium
Reveal answer
Answer: Potassium
Source evidence
PDF page 1526: 50. (a) Natural potassium contains
PDF page 1526: in a person would have a decay rate of 4140 Bq? (b) What is the fraction of in natural potassium, given that the person has 140 g in his body? (These numbers are typical for a 70-kg adult.)
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How much mass does the person have in his body in the potassium problem?
- 140 g
- 4000 kg
- 300 mg
- 60.0 g
Reveal answer
Answer: 140 g
Source evidence
PDF page 1526: in a person would have a decay rate of 4140 Bq? (b) What is the fraction of in natural potassium, given that the person has 140 g in his body? (These numbers are typical for a 70-kg adult.)
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In the tree problem, activity in 1.00 g of carbon drops to what rate?
- 1.00 decay per hour
- 0.250 Bq
- 3500 Ci
- 15.0 Ci
Reveal answer
Answer: 1.00 decay per hour
Source evidence
PDF page 1526: 54. A tree falls in a forest. How many years must pass
PDF page 1526: before the activity in 1.00 g of the tree’s carbon drops to 1.00 decay per hour?
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A cancer therapy source is considered too weak when its activity falls to what?
- 15.0 Ci
- 3500 Ci
- 1.75 Bq
- 4140 Bq
Reveal answer
Answer: 3500 Ci
Source evidence
PDF page 1526: source used for cancer therapy is
PDF page 1526: considered too weak to be useful when its activity falls to 3500 Ci. How long after its manufacture does this happen?
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A glow-in-the-dark exit sign uses light created by decay of what?
- Uranium
- Tritium
- Plutonium
- Radium
Reveal answer
Answer: Tritium
Source evidence
PDF page 1526: particles emitted in the decay of (tritium) interact with matter to create light in a glow-in-the-dark exit sign. At the time of manufacture, such a sign contains 15.0 Ci of .
AP College Physics
AP College Physics by OpenStax, used under CC BY 4.0. Changes made by Stratacademy.
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