1Given the atomic mass of Beryllium-11 is 11.021658 u, what is the nuclear binding energy of Beryllium-11? (mproton = 1.0078251, mneutron = 1.0086649, c2 = 931.5 eV/u)   1004 eV   65 eV   959 eV   63 eV   2Describe atomic spectra using the terms of electron shells, emission, absorption, and wavelengths.     3After two half-lives, how much of the original sample would remain?   50%   6.25%   12.5%   25% professor can you answer these 3 questions please?

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1. Characteristic K x-radiation of an element occurs when:   a. the incident electron is absorbed by a target nucleus  b. the incident electron is scattered by a target atom without an energy loss  c. an electron is ejected from an outer shell of a target atom  d. an electron in a target atom makes a transition to the lowest energy state    2. In connection with x-ray emission the symbol Kα(Seigbahn notation) refers to: a. an alpha particle radiation  b. an effect of the dielectric constant on energy levels  c. x-ray radiation from potassium  d. x-ray radiation associated with an electron going fromn= 2 to n = 1     3. In connection with x-ray emission the symbol Lβrefers to:  a. a beta particle radiation  b. an atomic state of angular momentumh/2π  c. the inductance associated with an orbiting electron  d. x-radiation associated with an electron going fromn= 4 to n = 2   4. The states being filled from the beginning to end of the lanthanide series of atoms are:  a. n= 3, l = 2 states…

Q2. An aluminum absorber of thickness 8 g/cm. The beam intensity is 8.24 J/ m s. a) Calculate the fraction of photons transmitted without interaction. b) What is the total transmitted beam intensity? c) What is the rate of energy absorption per unit mass in the aluminum?

The linear absorption coefficient for 5-MeV gamma rays in lead is 78 m-1. Find the thickness of lead required to reduce by one- fourth the intensity of beam of such gamma rays. O A. 8.9 mm O B. 17.8 mm OC. 3.7 mm OD. 1.9 mm O E. 7.4 mm

C3. A Rubidium nucleus undergoes the electron capture as given by 33Rb + e¯ → AXN+Y. Assume the electron came from the K-shell of Rubidium and K-edge is 15.2 keV. Given that the mass of neutral atom 33Rb is 82.9151106u, and the mass of neutral atom 4XN is 82.9141360u. (a) Determine the values of A, Z and N. (b) Given the name of particle Y. (c) Calculate the disintegration energy of the decay (in MeV). (d) Explain why K-edge should be considered in electron capture. Express the values to 3 significant figures, if necessary.