A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the mass was measured today, showing only 1.5 g remaining, calculate the half-life of the radioactive material. Please give your answer in units of days, rounded to the nearest day.

Q: How many half-lives have passed if about 3% (rounded) of the original parent material is left?

A: How many half-lives have passed if about 3% (rounded) of the original parent material is left?

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

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A: A neutron has no charge, so it will not be repelled or absorbed between neutrons and the nucleus.

Q: The half-life of krypton-91 ("Kr) is 10 s. At time t = 0 a heavy canister contains 3 g of this…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

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A:

Q: Suppose that the energy released by the splitting the nucleus of a single atom of a particular…

A: Given that:E=2.78×10-11 Jm=3.93×10-25 kgM=1 gm=10-3 kgMa=100000 Mt=100000×1000=108 kg

Q: If 232Th (half-life 1.4 × 1010 years) and 238U (half-life 4.5 × 109years) were present in equal…

A: The radioactive decay formula is Nt=N0e-0.693tT12                              ...... (1) From…

Q: A radioactive source is marked as containing 5mCi, but now measures 3.4 mCi. If the half life is 5.2…

A: Calculate the decay constant. λ=0.693t1/2=0.6935.2 =0.13327

Q: if you started with a parent isotope with 100% of its atoms and its half-life is 10 years. What is…

A: Given. t/T = 2 N(t) = No(1/2)t/T

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A: Half-life is the amount of time it takes for one half of a sample of a radioactive isotope to decay.…

Q: Cs-137 has a half-life of 30 years. Approximately how much time is required for the radiation of…

A: Given Data : The half-life of Cs-137 is given as t12=30 years

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Q: If Nitrogen-14 absorbs a neutron and then emits a Hydrogen-1, what nuclues is formed?

A: The given atom is a nitrogen-14 atom.   The reaction of a Nitrogen-14 with a neutron can be…

Q: The half-life of carbon-14 is 5730 yrs. Find (a) its decay constant __________s-1 (b) the initial…

A:

Q: If two grams of a radioactive isotope has a half - life of twenty hours, the half life of one gram…

A: half life of two grams of a radioactive isotope = 20 hours

Q: If you start out with 20 grams of a radioactive material, and 4 hours later you have 5 grams of that…

A: Given data:  Initial amount of material (N0) = 20 g Time (t) = 4 hours Remaining amount of material…

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A:

Q: A certain radioactive nuclide decays with a disintegration constant of 0.0137h1. (a) Calculate the…

A: Given  Disintegration constant λ=0.0137 h-1 (a)  half life T1/2 =0.693λ T1/2= 0.693/0.0137…

Q: What fraction of a radioactive sample remains after (a) one, (b) two, and (c) three half-lives have…

A: a)Fraction of material left after one half life is,

Q: What is half-life?

A: The half life is related to the radioactivity.  The time in which the number of atoms becomes half…

Q: A certain radioactive element has a half life of 3 hours.  How many hours would pass during 4…

A: Half life for a radioactive material is the time taken by the material to radiate to it's half…

Q: Three quarters of nuclie in a given radioactive sample decays in 2 weeks. What is the half life of…

A: we have to find half life of the sample, in the given question.

Q: A radioactive nucleus has half-life T1/2. A sample containing these nuclei has initial activity R0…

A:

Q: A certain radioactive material has a half-life of 10 years. You have 80 kg of the material. After 10…

A: It is given that,

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Q: Radioactive Decay (Calculus Math) The radioactive substance's initial mass is 1000 grammes. After 50…

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Q: The half-life of 14C is t1/2 5 5730 years, and 1.00 g of modern wood charcoal has an activity of…

A: Given: The half life is t=55730 yr. The mass is m=1 g. The activity is A=0.255 Bq. Part (a) The…

Q: The half-life of a radioisotope O indicates how tightly the nucleons are bound together O determines…

A: The half life of radioisotope is defined as the the amount of time taken for 50% of the original…

Q: The half life of a radioactive nucleus is 50 days. The time interval (t, – t) between the time t;…

A:

Q: Suppose you start with 1 kilogram of a radioactivesubstance that has a half-life of 7 years. How…

A: Radioactive decay is represented by,

Q: Complete the table for the radioactive isotope. Isotope 14C, Half Life (In years) 5715, Initial…

A: Half life of carbon 14 is 5715 years

Q: The half-life of radium-226 is 1.6 x 10 years. How long will it take for 20.0 mg of radium-226 to…

A:

Q: Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.…

A:

Q: The half-life of this nucleus is 1.0 seconds. For the following times fill in the rest of the chart…

A: Given  half life=1 sec required parent and daughter nuclei at given time

Q: If 10% of a radioactive material decays in 5 days, then the amount of the original material left…

A:

Q: A certain radioactive isotope decays to one sixteenth of its original amount in 4.0 hours. What is…

A:

Q: Mass spectrometric analysis of potassium and argon atoms in a Moon rock sample shows that the ratio…

A: In this question we have to find the age of the rock in years. Please give positive feedback if the…

Q: , how old is a sample if two-thirds of it is now the daughter isotope? What type of decay is…

A: We know , N=N0e-λt Where, N= remaining part of the sample N0=Initial amount of the sample λ=decay…

Q: The radioactive glucose used in PET scans has a half-life of approximately 2 hours. How much of the…

A: Half life (t) of radioactive glucose= 2 hours Time period (T) = 8 hours Let the original amount of…

Q: The original number of atoms in a sample of a radioactive element is 4.00x10-0 . Find the time it…

A:

Q: The daughters of beta decay have one less neutron and one more proton than their parent. Why?

A: A beta negative decay (β-) is a decay of the type:n→p++e-+νe¯When there is an excess of neutrons…

Q: Radioactive nuclide, 9ºSr, has a half-life of 30 years. What percent of a sample of 9ºSr will remain…

A:

Q: What is activity or rate of decay? Give its SI unit.

A: Generally the activity R which is the rate of decay is expressed in decays per unit of time.

Q: What fraction f1 of a radioactive sample will be left after 6 half‑lives?   What fraction f2 of a…

A: To determine: 1) fraction f1 of a radioactive sample will be left after 6 half‑lives 2) fraction f2…

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.