A radioactive element has a half life of 25 hours. After what time will 1/8 of initial number of its atom disintegrate? After what time will 1/32 of the initial number remain unchanged?
Q: The activity of a radioactive isotope is 16000 disintegrations/sec. The activity drops to…
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Q: A piece of bark is made up of carbon. It emits 7000 electrons per minute. Only the carbon 14 isotope…
A: number of electrons per minute = 7000 isotopic abundace of C-14 = 1.3×10-12
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A: Decay constant, proportionality between the size of a population of radioactive atoms and the rate…
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Q: Radon gas has a half-life of 3.83 days. If 2.86 g of radon gas is present at time t = 0, what mass…
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Q: A sample of radioactive nuclei has N0 nuclei at time t = 0. The half-life of the decay is T1/2. In…
A: Activity is, R=-∆N∆t
Q: 6. The bismuth-209 nucleus has a binding energy per nucleon of 7.6154 MeV. (1 MeV is 1.60 × 10-13…
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Q: Part A 90 You are examining a sample of rock that contains 1.6x1010 230 Th atoms decay by alpha…
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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 nucleus of a particular isotope of beryllium contains 4 protons and 5 neutrons. Which of the…
A: Given in question - The beryllium atom contains 4 protons and 5 neutrons. To find - Which one of…
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: Cobalt-60 and iodine-131 are used in treatments for some types of cancer. Cobalt-60 decays with a…
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Q: U-238 (Z=92) decays by β- to a daughter isotope, the atomic mass (A) and atomic number (Z) of the…
A: Given: Atomic no. of U, Z=92 Atomic mass of U, A=238
Q: wire of lengur = 7,5 A toward the top of the page and through a B = 3.0 T uniform magnetic field…
A: When a current carrying wire is placed in a uniform magnetic field, the magnetic force exerted by…
Q: Q1(i). The half-life of 20kg of Bismuth-210 is 20 minutes. Explain this statement. (ii). A…
A: (i) Given: Mass of Bi-210 is 20kg. The half life is 20min. Explanation: Half life is the time…
Q: The nucleus (15 8) O has a half-life of 122.2 s; (19 8) O has a half-life of 26.9 s. Assume that at…
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Q: Yttrium-90 is the daughter nucleus of an isotope that is a major waste product of nuclear reactions.…
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Q: A nuclear reaction is represented by: "N+H→C+He Given N has a mass of 14.003 074 u; C has a mass of…
A: Atomic number is defined as the number of protons in the nuclei and mass number is the total number…
Q: The nucleus (15 8) O has a half-life of 122.2 s; (19 8) O has a half-life of 26.9 s. Assume that at…
A: The following data are given:
Q: Which choice below is best for the mass of 3-He? [helium with a mass number of 3] (7) Half-life (6)…
A: Hydrogen have three isotopes , hydrogen, deuterium and tritium while hydrogen has two isotopes .
Q: How many stable isobars do you expect with atomic mass number 97? Number If the nucleus 97 42 with…
A: As you didn't specify the particular questions to be answered, as per the guidelines we are solving…
Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…
A: a) Calculate the decay constant. N(t)=Noe-λt λ=1tlnNoN Substitute the values. λ=1365 daysln200 g7.1…
Q: When an unstable nucleus decays by emitting an alpha particle, the atomic mass number of the nucleus…
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Q: When a nucleus decays by emitting an alpha particle, what is the atomic number of the resulting…
A: Given: 88 Ra226
Q: An isotope of iodine 1311, which has an eight-day half-life, is used in nuclear medicine. A sample…
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Q: 1. The decay of radioactive substance is given by -t T N = Nᵒe (1), where N is the number of atoms…
A: You are using incorrect symbol for Tau (decay constant).
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: What is the binding energy per nucleon of the rutherfordium isotope Rf? Here are some atomic masses…
A: Given,
Q: The half-life of a radioactive isotope is known to be exactly 1 h. a) What fraction of a sample…
A: Given in question - Half-life (T) = 1 hour Solution: Step1 - Here we will understand the concept…
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: Q23. When a deuteron (;H) of mass 2.0141lu and negligible kinetic energy is absorbed by a lithium…
A: The problem is based on the concept of alpha emission. In this process, the parent nucleus is…
Q: The decay of radioactive substance is given by N = Noe (1), where N is the number of atoms present…
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Q: The isotope palladium-112 undergoes beta decay. Write the reaction equation and determine the…
A: Concept: In beta decay, parent nucleus changes to daughter nucleus and a beta particle (electron)…
Q: Radon-220 has a half-life of 55.6 seconds. What are the odds that any particular Radon-220 atom will…
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Q: Question 84 ."Radium being a member of the uranium series occurs in uranium ores. If the half lives…
A: Solution:-Given thatHalf life of uranium (t12)=4.5×109 yearsHalf life of radium (t'12)=1620 years
Q: How much energy in kJ is released to form one mole of 75As from protons, electrons, and neutrons if…
A: The sum of the masses of the nucleons is greater than the mass of the nucleus. This difference in…
Q: Tritium has a half - life of 12.33 years. What fraction of the nuclei in a tritium sample will…
A: Formula to calculate the fraction of remaining sample after 5.00 yr. is,
Q: In a radioactive substance at t = 0, the number of atom is 8 x 104 . its half-life period is 3 yr.…
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Q: in the stable isotope of Potassium 39K there are 19 electrons, 19 protons and 20 neutrons. The mass…
A: Given: Isotope of Potassium K39 with, Number of protons Z=19. Number of neutrons N=20. Mass of the…
Q: 6. In nature, in a stable state hydrogen has two kinds of isotopes, namely 99.985% 1H with an atomic…
A: It is mentioned that there are two types of isotopes for hydrogen 1) 99.985% 1H with an atomic mass…
Q: half-life of element
A: Given: Half life time of an element X is t12=500 years Initial mass of element is 8 g Find: Final…
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: Calculate the mass defect of Nitrogen (A= 14, Z = 7). The atomic mass of Nitrogen is 14.00307 u.…
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