if you started with a parent isotope with 100% of its atoms and its half-life is 10 years. What is the parent/daughter percentage (P/D %) after two (2) have lives?   a. 87.5%; 12.5%   b. 75%; 25%   c. 25%; 75%   d. 12.5%; 87.5%

Q: Choose the BEST answer to the following. The equation that most underlies energy release in nuclear…

A: The equation in option (a) gives the energy of a photon.

Q: 18.Examine the table.  Isotope Half-Life (yrs) Carbon-14 5.715x10^3 Plutonium-239 2.41x10^4…

A: Given that, The half-life of Carbon-14 is 5.715×103 years The half-life of Plutonium-239 is 2.41×104…

Q: 8..At-219 is a nuclide produced during the decay of U-235, and At-219 in nature is estimated to be…

A:

Q: You are an archaeologist, and send some leather clothing found at a burial site to be radiocarbon…

A: The general formula for the activity as a function of time t is given by, Here, A, Ao, λ and t…

Q: an element has two natually occuring isotopes, one that has a mass of 8.6254 and makes up 15.56…

A:

Q: Your body contains several radioactive isotopes. Approximately 20% of the radiation dose you receive…

A: Beta-decay is a process that takes place in a radioactive atom. The original nuclide is converted…

Q: If the half-life of Uranium 235 is 700 million years, what would its third-life be?

A: Given data: The half life of Uranium 235 is t1/2=700 million years.   The expression for the…

Q: A radioactive source consists of 6.4 x 10^11 atoms of a nuclide of a half-life of 2 days. A second…

A: According to question we need to find--- After how many days will the number of radioactive atoms…

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: Can you help solve this?

A: Since there are multiple questions posted, we will answer the first question. Half-life is defined…

Q: If you make an account of 1000 people born in the year 2000 and find that half of them are still…

A: An account of 1000 people are made in 2000 and half of them are still alive in 2060. But this does…

Q: Imagine that all of the electrons from the given cobalt (Co)(Co) isotopes are stripped off so that…

A: all electrons are stripped off from different isotopes of cobalt (Co)

Q: What mass of a 2,400g sample of an isotope will remain after 32.8 days if the half life of the…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

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: If a 10-gram sample of a radioactive substance has a half-life of 6000 years, how much would be…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

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: A rock started with 4000 atoms of a parent radioactive isotope and now has 3750 daughter isotopes.…

A:

Q: If a sample of a radioactive isotope has a half-life of 1 year, how much of the original sample will…

A:

Q: For the radioactive isotope strontium-90, k is 2.47 x 10-2 years -1. If the original amount of…

A:

Q: 11) Titanium-46 is a stable isotope of the metal Titanium.  It has an atomic mass of 45.95 and…

A: Atomic mass = no. of proton+ no. of neutron Atomic no. = no. of proton

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 activity of a radioactive sample decreases by 93.75 % in 2.5 years. What is the half-life of…

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: Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32P, how many grams will remain…

A: Part (a):Given,

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: The Q value for the alpha decay of Tl203 is calculated to be 0.91 MeV from the masses of the initial…

A: Given: Q value: Q=0.91 [MeV] Atomic number of203Tl=203=Z Q value for a reaction is defined as the…

Q: The half-life of radon-222 is 2.8 days. How many days would it take for the activity due to radon in…

A: Given that:- Half life of radon-222=2.8 days

Q: Carbon-14 has a half-life of 5730 years. A sample of wood has been recovered by an archaeologist.…

A:

Q: If a sample of a radioactive isotope has a half-life of 3 years, how much of the original sample…

A: The half-life of the sample = 3 years (a) That means, after every 3year the sample becomes half of…

Q: A wood artifact discovered in 1990 showed a 14C-activity equivalent to 43% of that found in the…

A: Given : Half life of C-14, t1/2 = 5730 years Let initial count of C-14 be N = 100 The count of C-14…

Q: Americium-243 has a decay constant of 9.39* 10-5 years-1. How long will it take for a sample of…

A:

Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 24.2 h?…

A:

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 half-life of Cs-137 is about 9.46*10^8 seconds. The decay constant (λ) is 7.33*10^-10 s^-1.  If…

A: Given that: T1/2=9.46×108 sλ=7.33×10-10 s-1At t=0, dNdtr=1000To determine the decay rate…

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

A:

Q: In the table below, the 2-H is called Deuterium; its Atomic Mass is 2.014102. Which choice below is…

A: Mass of Deuterium is given as = 2.014102 No of protons in hydrogen 1 = 1

Q: The isotope Carbon 14 decays by β emission and has a half-life of 5730 years. The carbon in living…

A: This question can easily be solved by applying the concept of radiocarbon dating .

Q: A 25g piece of charcoal is discovered in a prehistoric cave. Carbon 14 of the sample shows a…

A: in this question we have to find year of trees by their samples of carbon . with help of radio…

Q: Carbon-14, with a half-life of 5730 years, has a decay constant of λ = 1.21 × 10-4 yr-1. A piece of…

A:

Q: Radioactive isotopes often occur together in mixtures. Suppose a 100 g sample contains 131Ba, with a…

A:

Q: If a sample contains 20g of an isotope that has a half life of 1000 years. How much will be left…

A: Given data:  Initial amount of sample (N0) = 20 g Half life (T1/2) = 1000 years Required: Remaining…

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

A:

Q: 14C has an activity of 0.25 Bq per gram of carbon for living organisms. The half-life of 14C is 5730…

A: Initial activity of C14 = 0.25 Bq per gram of carbon final activity of C 14 = 0.15 Bq per gram of…

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.