1- The atomic weight of lithium is 6.941. It has two natural isotopes, "Li and 'Li, with atomic weights of 6.015 and 7.016. What are the relative abundances of the two isotopes?
1- The atomic weight of lithium is 6.941. It has two natural isotopes, "Li and 'Li, with atomic weights of 6.015 and 7.016. What are the relative abundances of the two isotopes?
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Problems:
1- The atomic weight of lithium is 6.941. It has two natural
isotopes, "Li and Li, with atomic weights of 6.015 and 7.016.
What are the relative abundances of the two isotopes?
إدراج
2- Calculate the energy released when a thermal neutron is
absorbed by deuterium.
Problems
3- The atomic weight of 32P is 31.973910. What is the value of
A in MeV?
4- The Q value for alpha decay of 2394Pu is 5.25 MeV. Given the
masses of the 239 Pu and He atoms, 239.052175 AMU and
4.002603 AMU, calculate the mass of the 235U atom in AMU.
5- Calculate the Q value for the beta decay of the free neutron
into a proton,
0
n→p+B+v.
6- A 108 In source emits a 633-keV gamma photon and a 606-keV
internal-conversion electron from the K shell. What is the
binding energy of the electron in the K shell?
7- Calculate the recoil energy of the technetium atom as a
result of photon emission in the isomeric transition 99mT Tc
23TC+y.
8- Refer to the decay scheme of 13Cs. The binding energies of
the K- and L-shell electrons of the daughter Ba atom are 38
keV and 6 keV.
O
A
(a) What are the energies of the internal-conversion electrons
ejected from these shells?
(b) What is the wavelength of the barium Ka X ray emitted
when an L-shell electron makes a transition to the K shell?
(c) What is the value of the internal-conversion coefficient?
9- What is the maximum possible positron energy in the decay
of 35 Ar?
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