With the help of a mass spectrometer,% abundance ratios and Atomic mass (u) values ​​of various isotopes of the element krypton (36Kr) are given in the table as shown in the figure. Find the 'average atomic mass (u)' value of the krypton element according to these data?     İsotope (Kr) Abundance Ratio % Atomic Mass(u) 78 0,356 77,924610 80 2,270 79,916380 82 1,460 81,913482 83 11,500 82,914135 84 57,000 83,911507 86 17,000 85,910616

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

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Q: The activity of a radioactive isotope is 16000 disintegrations/sec. The activity drops to…

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Q: element X of atomic number 98 undergoes alpha-decays. The constant rate of alpha decay is n…

A: One mole Alpha particle has mass 4g

Q: 4.0X1018 atoms decay with a half-life of 2.3 years, how many are remaining after 3.7 years? Type the…

A: Given data: The initial number of atoms at time t=0, N0=4.0×1018. The half life of the atoms,…

Q: A sample containing I-131 has an activity of 6.40 × 108 Bq. How many days later will the sample have…

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Q: If 100 grams of a radioactive substance is left to decay, how much would be left after 5 half-lives?…

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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

Q: The isotopes of U8 and U5 occur in nature in the ratio 140 : 1. Assuming that at the time of earth's…

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Q: Use the isotope table (either linked here or previously printed out) to determine the mass defect of…

A: Given:-  Neon -20 atomic no. of neon (Z) = 10 Δm = mass defect [atomic mass unit (amu)] mp = mass of…

Q: Radiocarbon dating assumes that the abundance of 14C in the environment has been constant. Suppose…

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Q: After 32 days, only 1/16 of a radioactive sample remains. What is the half-life of this sample?…

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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: half-life of the isotope of iodine I-131 is 8 days. The activity of the sample at the moment is…

A: 1 Ci = 3.7 × 1010  decay/s Half life T1/2  = 8 days = 8 × 24 × 60 × 60 s = 6.912 × 105 s Rate of…

Q: While exploring a coal mine, scientists found plant fossils which had been preserved by an…

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Q: Element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes…

A: Dear student The average atomic mass of an atom can be found by : Mav = f1m1 + f2m2 + f3m3 Where f…

Q: Calculate the binding energy for Nickel. Nickel has an atomic mass of 58.69u, a mass number of 59…

A: Given that, The atomic mass of Nickel = 58.69 u Mass number = 59 Atomic number = 28   Number of…

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 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: The half-life of 231Pa is 3.25×104 years. How much of an initial 10.41 μg sample remains after…

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Q: Carbon is one of the fundamental elements in everything that's alive on Earth. The three naturally…

A: Carbon has generally three isotopes found in nature. Isotopes are those which have the same proton…

Q: A sample of 1000 radioactive atoms has a 10 minute half-life. How old is the sample when 750 atoms…

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Q: Which element's isotope is often used to treat cancer patients?

A: The correct option is cobalt Cobalt therapy or cobalt -60 therapy is the medical use of gamma rays…

Q: Jai was measuring the radioactivity of different radioactive isotopes. Isotope A had a starting…

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Q: Cobalt 60 is a γ emitter with a half-life of 5.27 years and a γ energy of 1.3 MeV. What is the…

A: Given data:  half life of cobalt = 5.27 years energy given = 1.3 MeV

Q: Natural Uranium, as found on earth, consists of two isotopes in the ratio of ^ 235 U/ ^ 238 U=0.07…

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Q: A radioactive sample is prepared; 10.78 hours later, only 1/16th of the original sample remains.…

A: Activity N=N0e-λt  10.78 hours later, only 1/16th of the original sample remains N016=N0e-λ10.78…

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

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Q: Geiger counter reading of a radioactive sample is initially 6520 counts per minute. The same sample…

A: Given:Initial count rate, N0 =6520 count/minFinal count rate, N = 422 count/mintime, t = 10.1 hr

Q: The fictitious element cincinnatium O has five stable isotopes. Their masses and natural abundances…

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Q: Part 3 Atomic Cakulatinns: Complete the chart belowe. 10. Hof p #of n # of e Element Atomic # Mass #…

A: Atomic # - No. of protons or electrons Mass # - No. of protons + No. of neutrons

Q: At 6:00 AM a hospital uses its cyclotron to make 1 milligram of the isotope fluorine-18 for use as a…

A: The initial value of isotope fluorine -18  is N0 = 1 mg. The half-life of F-18 is 1.8 hr. F-18 left…

Q: Determine the age of a certain rock sample: carbon -14 half life = 5730 years. An archeology dig…

A: Given that: t0.5=5730 yrs.A=1 CpmA0=16 Cpmλ=?t=?

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

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Q: A radioisotope has a half-life of 5.0 days. The activity of a radioisotope sample prepared ten days…

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Q: The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy…

A: Half life , t12 = 160 days  E = 6.1 MeV N0 = 1018 atoms t = 80 days  To find = Power emitted

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: You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly…

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

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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: In 4 years, 3/4 of nuclei of a given radioactive substance is decayed. What is the half- life of the…

A: Definition of  Half life:- Half life of a radioactive sample is defined as the time elapsed before…

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

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Q: A radioactive sample was measured 9.1 years ago. It had an activity of 9783.8 Bq. Today, its…

A: Given: The intial activity of the sample is 9783.8 Bq. The final activity of the sample is 21 Bq.…

Q: Radioactive Half-life Years Element A Remaining Radioactive Atoms Element B Remaining Radioactive…

A: Half life of a radioactive material is the time required by the material to disintegrate half of its…

Q: f life of a radioactive element is 29.2 vears, how many years will it take for a sample to decay to…

A: Givemhalf life of a radioactive element, t1/2= 29.2 vears

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

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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.