In the photoelectric effect, a certain metal on an emitter has a binding energy of 275 kJ/mol. What is the threshold frequency for this metal?

Q: ta 17 La carga nuclear efectiva de un átomo es principalmente afectada por: ponder Seleccione una: a…

A: The correct answer is -  electrones internos (inner electrons)   Explanation - - > The effective…

Q: A proton is accelerated to 75.1 MeV per particle. What is this energy in kJ/mol?

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Q: If the intensity of radiation is 255 microcuries (μCi) at a distance of 1.74 m, what is the…

A: The intensity of radiation (I) and distance (d) are inversely related according to inverse square…

Q: The half-life of the radioactive isotope 137Cs is 30.17 years. How long does one have to wait until…

A: To solve this problem we have to first calculate the rate constant of the reaction using half life…

Q: If an operator 14  m from a small source is exposed to 3.0 units of radiation, what will be the…

A:

Q: A proton is accelerated to 15.1 MeV per particle. What is this energy in kJ/mol?

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Q: A radioisotope produces an intensity of 8.75 x 10" becquerel (Bq) at a distance of 2.00 cm from the…

A: Given : Intensity at r1= 2cm , I1 =8.75x104 Bq Intensity at r2 = 36cm, I2 = ?

Q: What is the binding energy in kJ/mol Sb for antimony-123? |k]/mol 51 H+ 72;n Sb The required masses…

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Q: What is the half-life of the bizarre isotope Toddium - 419 (it is a makeup element) if after 4.00…

A: Time period, t = 4.00 weeks Initial amount, [A]o =950.0 g Final amount, [A] = 29.6875 g Calculation…

Q: Q4: Use the suitable method to calculate the binding energy per nucleon for the Thorium isotope23Th…

A: Mass defect is the difference between the expected mass of an atom of an element and the actual mass…

Q: What is the difference between Radiation Equilibrium, Charged Particle Equilibrium, Restricted CPE,…

A: Ans) • The concepts of radiation equilibrium (RE) andcharged-particle equilibrium (CPE) are usefulin…

Q: What is the binding energy in kJ/mol nucleons for lanthanum-138? kJ/mol nucleons 57 H+ 81,n- The…

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Q: a - particles from a polonium source strike a thin gold foil of thickness 4 x 10-7 m. Most of the…

A: Thickness of foil (L) = 4 x 10-7 m Fraction of alpha particles scattered by more than 90 degree =…

Q: Determine the binding energy in lithium-7.  (1 amu = 1.6606 x 10-27 kg; speed of light = 3 x…

A: Given : Lithium-7 1 amu=1.6606×10-27 kg Speed of light=3×108 m/sec To Find : Binding energy Solution…

Q: Find whether 6429 Cu is stable or not. If not, find the decay mode. Given: M(0“Cu) = 63.929766 amu…

A: Isotopes of an element have same atomic number but different mass number. Radioactive isotopes are…

Q: Silicon-32 is a beta emitter with a half-life of 650.0 years. How long would it take for a 8.00g…

A:

Q: A radioisotope produces an intensity of 8.75 x 10* becquerel (Bq) at a distance of 2.00 cm from the…

A: With the increase in distance the intensity decreases.

Q: 2. The sample of 355, is a - emitter, has an activity of 0.100 μCi. In 20.0 days, the activity of…

A: radioactive disintegration follow first order kinetics

Q: What is the binding energy in kJ/mol La for lanthanum-139? kJ/mol 57,H+ 82,n129I The required masses…

A: Given: 1H1 = 1.00783  0n1 = 1.00867    57La139 = 138.90610 given reaction: 571H1 + 820n1 ------>…

Q: In the human body, about 4000 positrons per day are generated by the decay of 4°K+, each of which…

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Q: A radiation of 250 nm incident on HI results in the decomposition 1.85 ×10^-2 mol within a…

A: GIVEN Here a radiation of 250nm incident on HI results in the decomposition eg 1.85 × 10-2 mol.…

Q: What is the binding energy in kJ/mol nucleons for antimony-123? kJ/mol nucleons 51 H+ 72;n–Sb The…

A: Answer: During a nuclear reaction, some mass of the nucleus loses itself and this lost mass gets…

Q: Which of the following would you expect to be radioactive * Sn-118 Pa-234 Mn-54 Zn-74

A: Which of the following is correct

Q: A sample of the inner part of a redwood tree felled in 1874 was shown to have 14C activity of 4.29…

A:

Q: What is the binding energy in kJ/mol nucleons for lanthanum-139? kJ/mol nucleons 57 H+ 82,n La The…

A:

Q: which The synthetic radioisotope technetium-99, decays by beta emission, is the most widely used…

A: The data given is,

Q: In an alpha particle (42He) scattering experiment, using a thin gold (19779Au) foil, the initial…

A: Given,  kinetic energy = 2.0MeV

Q: 6 Bez +e Li4 + Ve = -> electron capture by 7

A: Electron Capture Reaction It is a process by which a nuclide increases np ratio. Generally  a proton…

Q: Sodium-24 (ty = 15h) is used to study blood circulation. If a patient is injected with aqueous…

A: The activity use the first order formula , we can calculate it for 4 days.

Q: Radiation seed therapy is a common method for treating some prostate cancers and brain tumors.…

A: Radioactive degradation follow first order kinetics.

Q: The sample of 4x.is a B emitter has an activity of 0.5 uCi. In10 days the activity of the sample has…

A:

Q: A radiopharmaceutical has a biological half-life of 17 hr and an effective decay constant of 0.30…

A: When a radiopharmaceutical takes time to decrease to half of its initial value, then it undergoes…

Q: What is the ratio of weights of populations due to the effects of nuclear statistics for 35Cl2?

A: The ratio of weights of populations due to the effects of nuclear statistics for 35Cl2 has to be…

Q: Determine the binding energy in lithium-7.  (1 amu = 1.6606 x 10-27 kg; speed of light = 3 x…

A: Binding energy is the amount of energy required to seperate neutron and proton.  This can be…

Q: 2. The data in the table show the amount of a 500 g sample of sodium-24 over time. Time (h) Na-24…

A: The decomposition of a radioactive nuclei takes place by the removal alpha, beta or gamma particle.…

Q: What is the mass-defect of nickel N-62(atomic number=28, atomic weight =61.928345

A: The mass defect is the difference between the mass of a given nucleus and the total mass of its…

Q: 131| is a B-emitter (half-life = 8.040 days) used in medicine for the diagnosis and treatment of…

A: Half life=8.040 Starting amount of sample =2.05

Q: Compute the binding energy per nucleon for H (whose atom has a measured mass of 3.016050 u) 3He…

A: The mass defect (Δm) is calculated using equation (1) in which m is the given mass of atom, p is the…

Q: Compare the s- and r-processes in stellar nucleosynthesis.

A: The comparison between s and r processes is given below

Q: What is the binding energy in kJ/mol nucleons for antimony-123? kJ/mol nucleons 51 H+ 72;n→ Sb The…

A:

Q: Discuss the photo-neutron source showing how this reaction ²H(y,n)'H] gives a clear definition of…

A: Binding energy is the energy released when a proton and neutron combine to form a nucleon in a…

Q: Fluorine-18 undergoes positron emission with a half-life of 1.10 x 10- take for the amount of…

A: Solution :    Half-life is the time required to reduce the concentration of the compound to half of…

Q: How will the binding energy curve change if the range of the nuclear force suddenly changed to be…

A: The binding energy per nucleon increases sharply with mass number A upto 20. It increases…

Q: 9. Calculate the nuclear binding energy in MeV/nucleon for carbon-12. [Atomic masses (amu):…

A: The binding energy of any element can be found by finding out the mass defect in the atom. Since…

Q: The time flight of an CO+ (MW = 27.99) was 10.489 μs. What would it be the time flight (in μs) of…

A:

Q: A proton is accelerated to 13.9 MeV per particle. What is this energy in kJ/mol?

A:

Q: What is the binding energy of an atom having a mass deficiency of 0.4721 amu per atom? Express your…

A: Given:-  mass deficiency per atom = 0.4721 amu sped of light =  3x108ms-1…