A radioactive sample with a half-life of five hours. Calculate the radioactive efficiency after three and a half hours have passed. Calculate the ratio between the number of radioactive nuclei remaining in the sample to the number of Umayyads that were omitted

Q: a- The half-life of the radioactive nucleus Ra is about 1.6 x10 yr and the initial activity is…

A: Given t0.5 = 1.6 ×103 yr           No=11.3uCi  and we need to find difference in decay rate and…

Q: The half-life of the radioactive nucleus Ra(88, 226) is about 1.6 ×10^3 yr. what is the decay rate…

A:

Q: The decay behavior of a radioactive substance obeys first order kinetics: ln(N/No) = –kt, where N is…

A: first order kinetics,lnNN0=-ktwhere N is amount of radioactive nucle at timehalf life=20 min=1200…

Q: Radium decomposes at a rate proportional to the amount present. In 100 years, 100 mg of radium is…

A: Given: The mass of radium is No=100 mg. The reduced radium mass is N(t)=96 mg. Let λ is the decay…

Q: One useful radioisotope useful for dating the age of certain archaeological items is Carbon-14.…

A: Given :            t12= 5730  years              t= 17190 years          No. of half lives =…

Q: a) A certain radioactive has a half life of 20 years. 1: Calculate the disintegration constant of…

A: We are allowed to give the explanation of first question only which is given below.  Please repost…

Q: The number of radioactive atoms in a sample decay as the emission of radiation proceeds and this may…

A: According to the data given Half life is 3hr And relationship given is . N(t) = N0 e(-t/£)

Q: What is (a) an alpha particle? (b) a beta particle? (c) a gamma ray? (d) an X-ray? (e) a daughter…

A: Given : To explain each term.

Q: Can you help solve this?

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

Q: 1. A radioactive substance has a half-life period of 60 days What is the disintegration constant?…

A:

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: QI: A hospital technician is working with a radioactive source. The graph below shows the activity…

A: The given graph is shown below

Q: The steps below show three of the steps in the radioactive decay chain for 232 90Th. The half-life…

A: Given: The steps below show three of the steps in the radioactive decay chain for 232 90Th. The…

Q: 2. Calculate the activity due to 14C in 1.00 kg of carbon found in a living organism. Express the…

A: The given values are,

Q: 1 Nuclear Radius The density of nuclear matter can be estimated by assuming A spherical nucleons of…

A: As radius is given as r=r0A13, where r0 is a constant equal to1.2×10-15 m and A is number pf…

Q: (b) The results of activity measurements on a radioactive sample are given in the Table. i) Find the…

A:

Q: a) a tumor is injected with 0.4 grams of Iodine-125, which has a decay rate of 1.15% per day. to the…

A: (a) Given : Mass of Iodine - 125 : 0.4 grams Decy rate r = 1.15 % To find the time take for half of…

Q: In a piece of rock from the Moon, the 87 Rb content is assayed to be 1.82 × 1010 atoms per gram of…

A:

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A: The relation of the half-life in terms of wavelength is λ=0.693t1/2 Let's write the decay rate…

Q: Suppose a radioactive nucleus has a half-life of 2 min. and suppose the counting rate at time t = 0…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: Calculate the activity due to 14C in 1.00 kg of carbon found in a living organism. Express the…

A: The formula of activity is,

Q: a) The activity of a radioactive source is given by dN AN dt where N is the number of nuclei present…

A: A) The activity of a radioactive source is given by : -dNdt = λN initial number of nuclei = No at t…

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

A:

Q: Which expression correctly describes the radioactive decay of a substance whose half-life is T?…

A: To choose correct expression that describes the radioactive decay of a  substance whose half life is…

Q: Unreasonable ResultsThe relatively scarce naturally occurring calcium isotope 48Ca has a half-life…

A: One half-life is said to have been passed when the radioactive isotope decays to 50% of its initial…

Q: A radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013…

A: Radioactivity is the process of decay of heavy nuclei due to an unstable nuclei or due to a…

Q: B- Explain how you can carbon-date the age of a sample.

A: To carbon-date the age of a sample carbon -14 is used. Carbon -14 dating is a laboratory analysis…

Q: what type of radioactive source would you use to treat deep-seated brain tumors-alpha , beta, or…

A: To explain : The type of radioactive source used to treat deep-seated brain tumors

Q: The number of radioactive atoms in a sample decay as the emission of radiation proceeds and this may…

A: Radioactivity

Q: A radioactive sample contains 3.50 g of pure "C, which has a half-life of 20.4 min. (a) How many…

A: Formula to calculate the number of moles11 C is,

Q: A radioactive substance with an initial mass of 250 mg has a half-life of 1 year. a) Write an…

A: Given:inital mass, m = 250 mg= 250×10-3 gmhalf life, T12 = 1 yrSolution:a. Mass of the radioactive…

Q: A sample of carbon-14 initially consists of 5 × 10 24 particles. Carbon-14 has a half- life of 5730…

A: Solution: a. Calculate the decay constant for carbon-14 using the following relation. k=0.693t12…

Q: RADIOACTIVITY. LAW OF RADIOACTIVE DECAY Activity units: 1 Ci = 3.7 × 1010 Bq 1. Nuclear decay law: N…

A: Given: Iodine-120 , I-120 has half life, T1/2 = 1.35 hours. = 4860 s Initial activity , A0 = 1 Ci

Q: (a) The daughter nucleus formed in radioactive decay is often radioactive. Let N10 represent the…

A: For the first-order reaction, the rate of radioactivity is directly proportional to the number of…

Q: The number of radioactive atoms in a sample decay as the emission of radiation proceeds and this may…

A: Recall N=N0e-λt Where t1/2=ln2/λ       and  τ=1/λ

Q: An unstable isotope of cobalt, 60Co, has one more neutron in its nucleus than the stable 59Co and is…

A: Given Data The half-life of the isotope is T1/2 = 5.3 years. The mass of the cobalt is m = 4.20×10-2…

Q: You have a sample of unknown medication that is radioactive. You believe you should be able to…

A:

Q: b. A student has an 80 g sample of a radioactive material that has a half-life of 20 seconds. How…

A: Given: The initial amount of the radioactive sample is 80 g. The half lifetime is 20 s.

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: n 1986 the Chernobyl nuclear power plant exploded, and scattered radioactive material over Europe.…

A: Half life of Cesium-137 t1/2=30 years. Let initial amount of Cesium nuclei be No. We need to find…

Q: A sample of plutonium-239 has a mass of 24.0 mg. If after 72300 years 6.00mg are left, what is the…

A: Given data:  Initial quantity of plutonium (N0) = 24.0 mg Time elapsed (t) = 72300 years  Remaining…

Q: Q2: - Two samples of the same radioactive nuclide are prepared, each having the same size. Sample A…

A: Two samples of same radioactive nuclide are prepared, each having the same size.Sample A has twice…

Q: Americium-241 is used in smoke detectors. It has a first-order rate constant for radioactive decay…

A: The radioactive decay relation with the decay constant and radioactive sample quantity is given as…

Q: Initially, a particular sample has a total mass of 360 grams and contains 512 x 1010 radioactive…

A:

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.