An element X has 195 nucleons and 78 protons, and it undergoes a beta decay. After the decay, how many neutrons the daughter element will have?

Q: An archeologist discovers the bones of a person who appeared to have been dead a very long time.…

A: Half-life of radioactive element: = 5.73 x 103 y Activity of radio active element: A(t) = 0.259 Bq…

Q: A sample of radioactive material is obtained from a very old rock. The activity of the rock over a…

A: Given that: The equation of the activity of a radioactivity substance is A=A0e-λt The slope of the…

Q: A radioactive isotope has an initial activity of 8000 decays per second (dps). If its half-life is…

A: In radioactive decay, the number of radioactive atoms and their activity decrease over time.The…

Q: Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from…

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Q: The mass defect of a nuclei A with a mass number of 97 is 1.236 amu. Estimate the total binding…

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Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.00 billion years old by…

A: Given Mass (m)                      = 1.375 g Half-life of U238 t12 = 4.47×109  years Present time…

Q: A radioactive sample’s half-life is 1.0 min, so each nucleus in the sample has a 50% chance of…

A: Given A radioactive sample’s half-life is 1.0 min, then each nucleus in the sample has a 50% chance…

Q: Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom…

A: Mass of 131Iodine: M = 130.906114 amu  Number of protons in 131Iodine:: p = 53 Nuber of neutrons in…

Q: The mass of the 16O nuclide is 15.994915 u. What is the total binding energy for this nucleus

A: Given Atomic number is Z=8 Mass number is A=16 Mass of the 16O nuclide is M=15.994915 u

Q: Yttrium-90 is the daughter nucleus of an isotope that is a major waste product of nuclear reactions.…

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Q: The radioactive isotope (183-Ta) has a half life of 5.11 days. A sample containing the isotope as an…

A: Given data: Half-life t12=5.11 days Initial activity R0=4.5×108Bq

Q: a sample containing l-131 has an activity of 6.4x10^8 Bq.h how many days later will the sample have…

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Q: Determine the binding energy per nucleon of an Mg-24 nucleus. The Mg-24 nucleus has a mass of…

A: The total number of nucleons = Number of protons+ Number of neutrons For Mg-24: No of portons= 12…

Q: A nuclei has a half-life of 2.80 days. If 122 mCi were prepared but had a delay of 8.0 days. How…

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Q: radioactive source of a single nuclide emits 2.4 MeV neutrons at the rate of 2400 neutrons per…

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Q: Plutonium-239 (atomic number 94) is a by-product of nuclear power plants. It decays via alpha and…

A: A) decay constant = 0.693/half life = 0.693/24100 = 0.0000287 yr-1 = 0.693/(24100*365*86400) = 9.12…

Q: Ten deuterium nuclei (2.0141 amu each) fuse to give alpha particles (4.0026 amu). Calculate the…

A: Deuterium mass m1 =2.0141 amu Alpha particle mass m2 =4.0026 amu 10 21H -------> 5 42He

Q: The radioactive nuclide 199 Pt has a half-life of 30.8 minutes. A sample is prepared that has an…

A: Given data: Half life of Pt199 t1/2=30.8 min. Activity A=7.56×1011 Bq. The disintegration constant…

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: The remains of an ancient cave were unearthed. Analysis from charcoal in the cave gave 12.0…

A: Half life is defined as the interval of time required to decay half of the nuclei of radioactive…

Q: By natural radioactivity, U-238 emits an alpha particle. The heavy daughter nucleus is called…

A: In alpha decay, the atomic number of the daughter nucleus will be less than that of the parent…

Q: After 3.88 hours the activity is 5.35×104 Bq. (A) What is the half-life of the isotope? (B) What is…

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Q: A freshly prepared sample of certain radioactive isotope has an activity of 12.0 mCi. After 4.00h,…

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

A: Given, The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10…

Q: he half-life of the radioactive nucleus 88 Ra 226 is 1.6 × 10 3 yr. If a sample initially contains…

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