Radium-224 undergoes alpha decay with a half-life of 3.66 days. (a) Calculate the binding energy of radium-224 (b) What is the balanced equation for the alpha decay of radium-224? (c) What is the energy released (in both MeV and J) when a single radium-224 atom undergoes alpha decay?
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- A sample containing I-131 has an activity of 6.40 x 108 Bq. How many days later will the sample have an activity of 5.80 × 10° Bq? The half-life of I-131 is 8.0252 days. d.The half-life of 23$U, an alpha emitter, is 7.1 x 10° yr. Calculate the number of alpha particles emitted by 1.0 mg of this nuclide in 1.0 minute.Archeologist extracted 179 gm of carbon from an animal bone from an archeological site. The carbon shows an activity of 15 decays/s. (Half-life of 146C = 5730 years, 1 year = 3.156 x 107 seconds, Avogadro's number = 6.02 x 1023 atoms/mol) (A) Total number of atoms in this carbon sample = . (B) Decay constant of 146C, λ = . (C) Number of 146C atoms in this sample = . (D) Activity of 146C at time (t = 0) = . (E) Age of the animal =
- (a) At an initial time, a radioactive sample has an activity of 8.77x104 Bq. After 3.88 hours the activity is 5.35x104 Bq. (A) What is the half-life of the isotope? (B) What is the activity after an additional 3.88 hours? (A) (in s) OA: 6.426x103 OB: 9.317x103 oC: 1.351x104 OD: 1.959x104 OE: 2.840x104 OF: 4.119x104 OG: 5.972x104 (B) (in Bq) H: 8.660x104 OA: 1.387x104 OB: 1.845x104 OC: 2.454x104 OD: 3.264x104 OE: 4.341x104 OF: 5.773x104 OG: 7.678x104 OH: 1.021x105Please do it correctly!The nucleus of a fictitious element consists of 15 protons and 16 neutrons. The mass of the respective atom is 31.021 u. Calculate the nuclear binding energy per nucleon, in MeV. The mass of the hydrogen atom is 1.007825 u, the mass of the neutron is 1.008665 u.
- The alpha ray activity of a material is measured after equal successive inter-vals (hours), in terms of its initial activity as unity to the 0.835; 0.695; 0.580; 0.485; 0.405 and 0.335. Assuming that the activity obeys an exponential decay law, find the equation that best represents the activity and calculate the decay constant and the half-life.??????The amount of radioactive 40K in a 70kg person is approximately 5000Bq. A) what is the number (N) of radioactive 40K nuclei in the body? The half life of 40K is 1.25x109 years. B)What is the amount of natural potassium (in grams) in the body? The abundance of 40K is 0.012% of the natural potassium 39KThe binding energy for a nucleus containing Z protons and N neutrons is defined as c²[ZM + Nm, - M] where M is the mass of the neutral atom containing the nucleus, the quantity in the parentheses is the mass defect, and c? = 931.5 MeV/u.The binding energy of a nuclide can also be written as E, = Am x 931.5 MeV/u where Am is the mass defect. The Figure below show the mass for neutral atom and the nucleons of a helium atom. SHe Binding energy Mass = 4.0026 u Mass = 4.0330 u Calculate the mass defect Am of a helium atom