Initially, there is 50 mg of a certain radioactive material present and after two hours, it is observed that the material has lost 10% of its original mass. Find the mass (in mg) of the material after 9 hours.

Q: The isotope cobalt-60 has a nuclear mass of 59.933820 u. Calculate the mass defect of cobalt-60…

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Q: A radioactive series consists of two different radioactive materials. One radioactive material with…

A: Given that: Decay constant of parent nucleus = k1  Decay constant of daughter nucleus = k2  y1(0)=a…

Q: lodine-123 is a radioactive isotope used to study thyroid gland functions. It decays in a…

A: half life of iodine -123 isotope = 13.1hr mass of sample recieved (mo) = 10 g mass of sample decayed…

Q: An 10 g sample of a radioactive element takes 5432.6 years to reduce into 1 g. Calculate the…

A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…

Q: A student carries out a radioactive decay experiment. She measures the activity of a source as a…

A: Given: The activity of the substance is given as below. Rt=714e-0.41×t…

Q: A freshly prepared sample of a certain radioactive isotope has an activity of 3.7 × 1011 decays/s.…

A: Relation between activity of the radioactive isotope and half life…

Q: One of the nuclear fission reaction that can happen in a nuclear reactor is the fission of…

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Q: Tritium, or hydrogen-3, is formed in the upper atmosphere by cosmic rays, similar to the formation…

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Q: The Half-life of certain radioactive sample is 30 minutes. At 2.00 PM, the decay rate is measured to…

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Q: 15. When U-232 undergoes alpha decay to Th-228, a mass lost is sustained. (1) Find the mass defect…

A: The exact mass of U-232 is 232.0372 amu. The exact mass of Th-228 is 228.0287 amu.The exact mass of…

Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.8 kg sample…

A: Approach to solving the question: Detailed explanation: Examples: Key references:

Q: An isotope of the element erbium has a half-life of approximately 12 hours. Initially there are 30.1…

A: When a nucleus destroys a part of its mass and emits radiation is called radioactivity. The rays…

Q: The mass defect for potassium-40 is: -___x10-28kg. (Give your answer with 3 sig digs and do not…

A: The objective of this question is to calculate the mass defect of potassium-40. The mass defect is…

Q: Natural potassium contains 40K, which has a half-life of 1.277 ✕ 109 y. What mass (in g) of 40K in a…

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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: Gold-197 has an atomic number of 79 and an atomic mass number of 197.  The mass of a gold nucleus…

A: Gold-197 has an atomic number of 79 and an atomic mass number of 197.    The mass of a gold nucleus…

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: Initially, there is 60 mg of a certain radioactive material present and after two hours, it is…

A: Given value--- initial amount = 60 mg. after two hours, it is observed that the material has lost…

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: Thorium 230 90Th decays to radium 22688Ra by a emission. The masses of the neutral atoms are…

A: Energy released in a decay depends on the mass difference between initial atom and final atom, or…

Q: The amount of radioactive material present at time t is given by A =?0? ?? where ?0 is the initial…

A: Amount of radioactive substance at time t is, A=Aoekt.............1 where Ao is the initial amount,…

Q: freshly prepared sample of a certain radioactive isotope has an activity of 3.7 × 1011 decays/s.…

A: Given data R0=3.7×1011 decays/sR=2.96×1011 decays/st=4 h=4×3600 s

Q: The nucleus of a fictitious element consists of 15 protons and 16 neutrons. The mass of the…

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Q: An 8 g sample of a radioactive element takes 8.42 million years to reduce into 2 g. Calculate the…

A: Some configurations of protons and neutrons inside a nucleus are unstable. When an atomic nucleus is…

Q: The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10 hours.…

A: Given, The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10…

Q: Radon gas has a half-life of 3.83 days. If 3.00 g of radon gas is present at time t = 0, what mass…

A: Given Data : The half-life of radon is given as t1/2 = 3.83 days. The mass of radon gas is given as…

Q: Californium-254 has a half-life of 60days. (a) A sample has a mass of 16 mg initially. Find a…

A: Half life of a radioactive substance is a constant quantity. It tells the time taken by a given…

Q: Radon gas has a half-life of 3.83 days. If 2.70 g of radon gas is present at time t = 0, what mass…

A: Given: Half life, t1/2 = 3.83 days At t=0 mass of radon ,Co = 2.70 g   To determine mass of radon…

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.