freshly prepared sample of a certain radioactive isotope has an activity of 3.7 × 1011 decays/s. After 4.00 h, the activity is 2,96 × 1011 decays/s. Calculate the number of atoms of the isotope that were contained in the freshly prepared sample.

Q: The relative atomic mass of isotope iron-56 (5626Fe) is 55.93494 u. If the nuclear binding energy…

A:

Q: A radioactive material initially is observed to have an activity of 1000 decays per second. If 9.0…

A: Given : A0 = 1000 decays/sec A = 100 decays/sec t = 9 hours

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 44.5 g sample of carbon has an activity of 8.55 decays per second. How old is it? Please give your…

A: Given data The mass of the sample of carbon is given as m = 44.5 kg.  The number of decays is given…

Q: In this nuclear reaction F + il the atomic mass of H is 1.007825 u, the atomic mass of 0 is…

A:

Q: What is the energy absorbed in this endothermic nuclear reaction? 31,15 P + hydrogen--> 31,16 S +…

A: The mass defect is given by

Q: A freshly prepared sample of a certain radioactive isotope has an activity of 3,7 × 1011 decays/s.…

A: Given quantities: initial activity of the isotope (A0) = 3.7 × 1011 decays/s activity of the isotope…

Q: What is the energy released in this β−β−nuclear reaction 20380Hg→20381Ti+0−1e80203Hg→81203Ti+−10e?…

A: The expression for the nuclear reaction is,

Q: 3. Decay of a radioactive material takes place according to the data given in Table 2. Find the…

A:

Q: What is the binding energy per nucleon of an alpha particle? The nuclear mass of an alpha particle…

A:

Q: (1) Half life of carbon 14 is approximately (a) 5912 years (b) 6912 years (c) 3172 years (d) 5715…

A: Part (i) The carbon 14 half-life is approx. 5715 years.

Q: The half-life of the radioactive nucleus 226 88Ra is 1.6 ᵡ 103 yr. If a sample initially contains…

A: The expression for the decay constant(λ) is given as, λ = ln 2t1/2, where t1/2 is the half-life…

Q: A sample of radioisotope has a decay constant of 9.978×107 s1 and prepared with an initial activity…

A: Given: The decay constant of the radioactive sample is 9.978x10-7 s-1. The initial activity of the…

Q: (A) Binding energy of 22286Ra nucleus =   (B) Binding energy per nucleon of 22286Ra nucleus

A:

Q: The fission of a single nucleus of 235U releases 200 MeV of energy. What is the number of fissions…

A: Given Data: The energy released during single fission is, E = 200 MeV. The power required is, P = 1…

Q: A 5000-Ci ⁶⁰Co source used for cancer therapy is considered too weak to be useful when its activity…

A: Basic Details The ratio of the activity is an exponential function of decay activity and the time…

Q: The radioactive isotope 31Si has a half-life of 2.62 h. A sample containing this isotope has an…

A: decay constant (d) = 0.693/half life d = 0.693/2.62 hr -1 d = 0.2645 hr-1 d = 0.00007347328 sec-1…

Q: When 2041Ca ( Atomic Mass , 40.962278 u ) decays by electron capture, the disintegration energy is…

A:

Q: Use the following data to calculate the binding energy per nucleon in MeV of the Rhodium-103 nuclide…

A:

Q: The particle formed in this reaction is:6 14C = 714N + _____ is: a)  an alpha particle  b)  a beta…

A: Given: The particle formed in this reaction is:6 14C = 714N + _____ is

Q: The carbon–14 activity in papyrus growing along the Nile River today is 231 decay events per…

A: Name of element Carbon 14 Decay events per kilogram of papyrus = 231 Decay events per kilogram of…

Q: Plutonium-238 (238Pu) is a radioactive isotope with a half-life of 87.7 years. If a sample of 238Pu…

A: Given Half life=87.7year Activity after the=438.5year

Q: Use the following table of atomic masses to determine the energy released in the alpha decay of 243,…

A: Result             5.43 MeV Solution

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: 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: 11) Titanium-46 is a stable isotope of the metal Titanium.  It has an atomic mass of 45.95 and…

A: Atomic mass = no. of proton+ no. of neutron Atomic no. = no. of proton

Q: A patient is injected 465 MBq of radioactive isotopes with a half life of 110 minutes. How much…

A: Given: Half life, T=110 min=6600 s Radioactive injected in a body, N0=465 MBq Let's find the…

Q: An unstable nucleus undergoes alpha decay with the release of 5.52 MeV of energy. The combined mass…

A: Given    Let the parent nuclei be A daugther nuclei be B The nuclear reaction is given as  A = B +…

Q: The unstable 234Th isotope decays by beta emission with a half-life of 24.5 days. If the initial…

A:

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.90 billion years old by…

A: Given, Half-life of U238 is 4.47 ×109 years

Q: Deuterium fuses with tritium by the following reaction: 21H+31H⟶42He+10n12H+13H⟶24He+01n The…

A: Given that: H12+H13=H24e+n01m(H12)=2.014102um(H13)=3.016049uKnown values:m(H24e)=4.002602…

Q: 46. Old stars obtain part of their energy by the fusion of three alpha particles to form a 1?C…

A: Given, the fact that three alpha particles fuse to form a carbon nucleus. We know,  m(4He2) =…

Q: The decay rate dt for N number of radioactive nuclei is dN dt - AN What is meant by higher decay…

A: The formula of the radio activity is  where, N is the number of atoms present and is the decay…

Q: The rest mass of a proton-is 1.0072764666 u and that of a neutron is 1.0086649158 u. The 4He nucleus…

A: Mass of proton(mp )=1.0072764666u mass of neutron(mn)=1.0086649158 u mass of helium nucleus(mHe…

Q: View Image

A: From the nuclear reaction mass lost in the reaction is:

Q: A patient is injected with a radioactive isotope with a radiological half life of 12 days. The…

A: Option: A

Q: Identify the unknown particle X in the following equations for nuclear decay, and state whether each…

A: Given:the nuclear reaction is T65152b* →  T65152b  + XAsked:Identify the element Xand to state the…

Q: Archeologist extracted 179 gm of carbon from an animal bone from an archeological site. The carbon…

A:

Q: Consider a chain of radioactive decays 1-2-3, where nuclei of type 3 are stable. We assume that we…

A: Since you have posted a question with multiple subparts, we will solve first three only as per…

Q: A 5.00 g charcoal sample from an ancient fire pit has a 14C activity of 63.0 disintegrations/min. A…

A:

Q: What is the energy released in this β+β+ nuclear reaction 2514Si→2513Al+01e1425Si→1325Al+10e? (The…

A: The given nuclear reaction after releasing Beta particle is,

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: What is the missing in this nuclear equation? Mg 1224 + n01 - Na 1123 + a. e -10 b. e +10 C. H11 d.…

A: Use the conservation of mass and the conservation of charge to find the unknown element.

Q: Which of the following formula is used to calculate the decay constant A which is related to the…

A: Given data:  Decay constant = λ The half-life (t1/2) = T Required: The decay constant λ in terms of…

Q: A sample of wood from a Thracian chariot found in an excavation in Bulgaria has a 14C activity of…

A: Given : A=11.2 dis/min/gm            (Final/Present activity)              A0=15.3 dis/min/gm…

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

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.