A radioactive sample has a half-life of 28 mins. If the initial amount of sample was 2 g, estimate how much will be left after 40 mins,
Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…
A: Given: Mo=200 gM=23.0 gt=1 year = 365 days
Q: When we talk about radioactive decay, we often talk about a half-life, i.e. the amount of time it…
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Q: After 1.82 days, the activity of a sample of an unknown type radioactive material has decreased to…
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Q: After how many half-lives will (a) 10.0%, (b) 5.00%, and (c) 1.00% of a radioactive sample remain?
A: Formula to calculate the number of half-lives is,
Q: After 2.14 days, the activity of a sample of an unknown type radioactive material has decreased to…
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Q: Krypton-81m (81mKr) is a radioactive isotope with a half-life of 13.1 s that is often used in…
A: The correct option is (e) 50.26 s
Q: The isotopes of U8 and U5 occur in nature in the ratio 140 : 1. Assuming that at the time of earth's…
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Q: archaeologist sometime in the future analyzes the iron used in an old building. The iron contains…
A: half life of Ni -63 t/2 = 92 years LET x half life passed (N0 /2)X =( N0 / 128 ) = (N0 /2)7 X = 7…
Q: A radioactive sample is observed for 160 days. After 160 days the amount of the sample is found to…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…
Q: Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy…
A: Given: The half-life of tritium = 12.3 years Amount of tritium present in the old brand =1256
Q: A thyroid cancer patient is given a dosage of 131I (half-life = 8.1 d). What fraction of the dosage…
A: The objective of the question is to find out the fraction of the dosage of Iodine-131 that will…
Q: The radioactive isotope 209 Po has a half-life of 103 years. How long would it take 84 for only 4.00…
A: Given: The half-life time is 103 years. The remaining sample is 4 g. The total amount of the sample…
Q: Choose the BEST answer to the following. A radioactive sample has a half-life of 1 hour. Starting…
A: The number of half -life passed in a time is,
Q: A radioactive sample is observed for 5 days. After 5 days the amount of the sample is found to be…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…
Q: A radioactive sample containing approximately 6.52×10¹3 radioactive nuclides has a half-life of 5730…
A: Radioactive nuclides are those nuclides that are unstable. This happens due to the mismatch between…
Q: Consider a pure 4.0g sample of radioactive gallium-67. If the half-life is 78 h, how much time is…
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Q: (b) The results of activity measurements on a radioactive sample are given in the Table. i) Find the…
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Q: A sample initially consists of No radioactive atoms of a single isotope. After a time, t, the number…
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Q: A radioactive sample studied in a lab is found to have a half-life of 48 hours. If the initial…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The half-life for a…
Q: A radioactive sample contains 1.55g of of an isotope with half a life of 3.8 days. How much of the…
A: Given data: Original amount of substance (N0) = 1.55 g Half life (T1/2) = 3.8 days Time (t) = 11.4…
Q: If 16 g of radon with a half-life of 4 days is present in a balloon at t = 0, what is the mass of…
A: Most of the nuclei present are unstable in nature. They try to gain stability by disintegrating…
Q: The half-life of a radioactive isotope is known to be exactly 1 h. a) What fraction of a sample…
A: Given in question - Half-life (T) = 1 hour Solution: Step1 - Here we will understand the concept…
Q: The decay of radioactive substance is given by N = Noe (1), where N is the number of atoms present…
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Q: What percentage of a radioactive substance remains after 7.00 half-lives have elapsed?
A: Time=7 half life
Q: What fraction of radioactive nucleus sample survive after two half-lives?
A: Half-life is the time taken by the radioactive element to become the half of the original amount as…
Q: Monique, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…
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Q: 8. The half-life for a radioactive isotope is 4.00 × 10⁹ yr. Determine the age (in years) of a rock…
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Q: A Geiger counter reading of a radioactive sample is initially 7020 counts per minute. The same…
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Q: A 10 g sample of a radioactive element took 12 days to reduce into 1 g. Calculate the half-life and…
A: Some configurations of protons and neutrons inside a nucleus are unstable. When an atomic nucleus is…
Q: 64 g of a radioactive substance is prepared. 105 hours later, only 16 g remains. To the nearest…
A: To the nearest hour, the radioactive half-life of the substance is 52.5hours
Q: Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy…
A: The amount remaining is equal to the original amount times 1/2 raised to the of half-lives that have…
Q: radioactive substance has a half life of 2120 years. A) Determine the rate constant for the decay…
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Q: What is the half-life of a radioactive isotope if the activity of a sample drops from 6,080 cpm to…
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Q: A radioactive sample studied in a lab is found to have a half-life of 25 hours. If the initial…
A: Radioactive decay is the process by which an unstable atomic nucleus spontaneously emits particles…
Q: The number of radioactive nuclei present at the start of an experiment is 5.38 x 1015. The number…
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Q: A 5 g sample of a radioactive element takes 102 days to reduce into 3 g. Calculate the half-life and…
A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…
Q: Consider a small pot with a copper base. The base has a thickness of 2.0 mm and a diameter of 15 cm.…
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Q: Strontium-90 is a radioactive material that decays according to the function A(t) = An e -0.0244t…
A: Given that---- initial amount of material A0 = 500 g. Radioactive material decay function-----…
Q: A 10 g sample of a radioactive element takes 16.21 mins to reduce into 6 g. Calculate the half-life…
A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…
Q: The half-life of a radioactive isotope is 140 d. How many days would it take for the decay rate of a…
A: Given that, Half life of the isotope, T = 140 days We know that, The half life is the time in…
Q: Xe-124 an isotope of xenon has the highest half-life of 1.8 × 1022 yrs. Estimate the time it would…
A: When a nucleus becomes unstable it will undergo radioactive decay to attain a stable configuration.…
Q: Potassium-argon dating is used to measure the age of rocks formed from cooled lava by determining…
A: Potassium-argon dating is an interesting way to measure the age of rocks formed from cooled lava. It…
Q: A Geiger counter reading of a radioactive sample is initially 6520 counts per minute. The same…
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