Polonium-208 is an alpha emitter with a half-life of 2.90 years. How many milligrams of polonium...
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Polonium-208 is an alpha emitter with a half-life of 2.90 years.
How many milligrams of polonium...
1. Polonium-209, an α emitter, has a half-life of 102 years. How many α particles are...
1. Polonium-209, an α emitter, has a half-life of 102 years. How many α particles are emitted in 1.5 s from a 1.2 ng sample of 209Po? 2. A 1.0 mg sample of 126Sn decays initially at a rate of 4.6×105 disintegrations/s. What is the half-life of 126Sn in years?
Cesium- 137, a beta emitter, has a half-life of 30y. - How many grams of a...
Cesium- 137, a beta emitter, has a half-life of 30y. - How many grams of a 16g sample of Cesium- 137 would remain after 90y. - How many years will be needed for a 28g of Cesium- 137 to devay to 3.5 g of Cesium- 137.
Calcium-47, used to evaluate bone metabolism, has a half-life of 4.5 days. How many milligrams of...
Calcium-47, used to evaluate bone metabolism, has a half-life of 4.5 days. How many milligrams of a 49-mg sample of calcium-47 remain after 54 days? Express your answer using two significant figures. mg
A The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains...
A The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 6.55 years? 0.837 B. 3.23 x 10-15 OC. 4.779 OD. 1.588 E. 1.163
Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of...
Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 44.0 % of an Am-241 sample to decay?
Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of...
Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 32.0 % of an Am-241 sample to decay? Express your answer numerically in years.
6) Pu-239 is produced in the nuclear fuel cycle in nuclear power plants. The half-life of...
6) Pu-239 is produced in the nuclear fuel cycle in nuclear power plants. The half-life of Pu- 239 is 24,000 years. If 500.0mg of Pu-239 are generated this year, how much will remain this month in the year 2683? (2 points) a. b. How much of the original 500.0 mg of Pu-239 will be left after 6 half-lives? (2 points) 7) Polonium-210 has a half-life of 140 days. How long will it take for a sample of 385g of Polonium-210...
2. One of the nuclides in spent nuclear fuel is U-234, an alpha emitter with a...
2. One of the nuclides in spent nuclear fuel is U-234, an alpha emitter with a half-life of 2.44 x 10 years. How much of a 10 g sample of U-234 will remain after 1.22 x 10 years?
The half-life of 235U, an alpha emitter, is 7.1×1087.1×108 yr. Calculate the number of alpha particles...
The half-life of 235U, an alpha emitter, is 7.1×1087.1×108 yr. Calculate the number of alpha particles emitted by 9.0 mg of this nuclide in 1 minute someone please help
9. Technetium-99m is an ideal radioisotope for scanning organs, because it has a half-life of 6.0...
9. Technetium-99m is an ideal radioisotope for scanning organs, because it has a half-life of 6.0 hr and is a pure gamma emitter. Suppose that 80.0 mg were prepared in the technetium generator this morning. How many milligrams would remain after: a. one half-Life b. two half-lives c. 18 hrs. d. 24 hrs.
Calcium-47, used to evaluate bone metabolism, has a half-life of 4.5 days. How many milligrams of a 49-mg sample of calcium-47 remain after 54 days? Express your answer using two significant figures. mg
A The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 6.55 years? 0.837 B. 3.23 x 10-15 OC. 4.779 OD. 1.588 E. 1.163
6) Pu-239 is produced in the nuclear fuel cycle in nuclear power plants. The half-life of Pu- 239 is 24,000 years. If 500.0mg of Pu-239 are generated this year, how much will remain this month in the year 2683? (2 points) a. b. How much of the original 500.0 mg of Pu-239 will be left after 6 half-lives? (2 points) 7) Polonium-210 has a half-life of 140 days. How long will it take for a sample of 385g of Polonium-210...
2. One of the nuclides in spent nuclear fuel is U-234, an alpha emitter with a half-life of 2.44 x 10 years. How much of a 10 g sample of U-234 will remain after 1.22 x 10 years?
9. Technetium-99m is an ideal radioisotope for scanning organs, because it has a half-life of 6.0 hr and is a pure gamma emitter. Suppose that 80.0 mg were prepared in the technetium generator this morning. How many milligrams would remain after: a. one half-Life b. two half-lives c. 18 hrs. d. 24 hrs.
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