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Radioactivity
Page 10
Questions (537)
Sodium-24 has a half-life of approximately 15 hours. If only one-eighth of the sodium-24 remains, about how much time has
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e
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The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?
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e
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7) Elements that spontaneously emit radiation from their nucleus is called (a) half-life elements (b) radioactive elements (c)
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A radioisotope has a half-life of 2.5 hours. What percentage of a sample would be left after 12.5 hours?
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A radioisotope has a half-life of 2.5 hours.What percentage of a sample would be left after 12.5 hours?
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Suppose a hypothetical radioactive nucleus (Hy) has a half-life of 10 days. If we have 80 gms of the substance at the start of
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Tim
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A radioactive source has a half-life of 6 days.How long will it take for the count rate to fall from 180 per minutes to 145.
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Robotic
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The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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51 views
The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?
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e
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The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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Brandon Thorne
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An artifact was found with a radioactive substance present. The function f(x)=16(.90)x can be used to determine the amount of
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The half-life for a 100-gram sample of radioactive element X is 10 days. How much of element X remains after 30 days have
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e
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How much carbon-14 do you have in your system today compared to the amount you had when you were born
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Americium-241 is a radioactive substance used in smoke detectors. The half life of americium is 432 years. If a smoke detector
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The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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Americium-241 is a radioactive substance used in smoke detectors. The half life of americium is 432 years. If a smoke detector
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44 views
A radioisotope has a half life of 7.5 hours. How many half lives have occurred after 67.5 hours?
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A radioisotope has a half-life of 7.5 hours. How many half lives have occured after 67.5 hours? a 7 half-lives b 8 half-lives c
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red
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Physical Science Semester A exam question 11
Americium-241 is radioactive substance used in smoke detectors. the half life of
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A medical device uses the radioactive isotope cesium 137. The function f(t) = 28(0.5) 30 gives the number of
grams of the isotope
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What happens if you eat a gram of uranium?
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Which type of radioactive particle (alpha, beta, or gamma) is most harmful to humans, and why?
• None of these are harmful •
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Which scientist discovered the two radioactive elements radium and polonium?
A. Marie Curie B. Niels Bohr C. Albert Einstein D.
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The table shows the exponential relationship between the number of grams of a radioactive sample, y, and the number of years, x,
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Anonymous
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16. A technician places 50 mg of a radioactive substance into a laboratory chamber.
After 10 minutes, 41 mg remain.
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You have 7,160 grams of a radioactive kind of bismuth. How much will be left after 10 days if its half-life is 5 days?
.
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Read the passage.
excerpt from "Marie Curie and the Discovery of Radioactivity" by Mara Rockliff The energy appeared to come from
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emilymay_2356
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The half-life of a radioactive kind of antimony is 4 days. How much will be left after 12 days, if you start with 7,600 grams of
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pp
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Scientists are studying a sample of radioactive material. The amount left, in grams, after t days can be modeled by the function
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pp
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The half-life of a radioactive kind of nitrogen is 10 minutes. If you start with 120 grams of it, how much will be left after 20
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You have 1,312 grams of a radioactive kind of lanthanum. If its half-life is 93 minutes, how much will be left after 279
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How much of a radioactive kind of francium will be left after 44 minutes if you start with 2,616 grams and the half-life is 22
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How much of a radioactive kind of promethium will be left after 20 days if you start with 9,056 grams and the half-life is 5
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A sample of a radioactive isotope had an initial mass of 800 mg in the year 2000 and decays exponentially over time. A
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An element with mass 510 grams decays by 26.3% per minute. How much of the element is remaining after 7 minutes, to the nearest
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A scientist performed an experiment with a radioactive substance whose half-life is 22 min. The scientist will sketch a graph of
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Estrella Torres
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What is the ability of a atom to give off charged particals energy from its nucleus
radio waves half life radin waves radiant
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Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the
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The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463 × 10^11 years longer. What is the
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@fw.2trimm is my instagram if u want ta follow
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The half-life of cobalt-60 is 5 years. How old is a sample of cobalt-60 if only one-eighth of the original sample is still
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The half-life of iodine-131 is 8 days. Chan Hee examines two samples of iodine-131.
Sample 1: 10 g Sample 2: 20 g What can Chan
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Iodine -131 is a radioactive substance that decays at a rate of 8.3% every day. If a sample contains x grams of iodine -131
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Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5 times 10^9 years. The half-life
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Use this paragraph: The half-life of carbon-14 is 5,700 years. A certain sample of wood has 20 grams of carbon-14 when it is
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You have 976 grams of a radioactive kind of rhodium. How much will be left after 120 seconds if its half-life is 30 seconds?
gram
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ik ur cheating
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The half-life of a radioactive kind of protactinium is 27 days. How much will be left after 54 days, if you start with 488 grams
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ik ur cheating
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odine-131 is a radioactive substance that decays at a rate of 8.3% every day. If a sample contains x grams of iodine-131 after 2
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ik ur cheating
46 views
The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?
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Consider the following scenarioA sample of radioactive material has a decay constant of 0.04 per hourIf there are initially 500
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