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1) Uranium (Z=92) occurs as a isotope with A=, how many neutrons are there?
2) What is the size (radius) of the nucleus in fm to 2 decimal places in the previous problem?

3) Deuterium, 2H,is made up of a proton and a neutron.Given that the mass of 1H is 1.007825 u, the mass of a proton is 1.007276 u and the mass of a neutron is 1.008665 u and that the atomic mass of 2H is , what is the magnitude of the mass difference between 2H and its constituents in units of u to 6 decimal places?
4) What is the binding energy in MeV to three decimal places of the nucleus in the previous problem?

5) Let T be the total energy released in the alpha decay of a parent nucleus initially at rest. T is obtained by taking the difference of the mass of the parent nucleus and the sum of the masses of the daughter nucleus plus the alpha particle. If the mass of the daughter nucleus is u and the mass of the alpha particle is 4.0026 u, determine the kinetic energy of the daughter nucleus as a percentage (to 3 decimal places) of T by using the principle of conservation of momentum and the conservation of energy.

6) The half-life of carbon-14 is 5.730x103 years. If the initial activity of a sample of an ancient artifact is presently 5.090x108 decays per year, what will the activity be in decays per minute of this same sample years from now?

7) If a sample of bone contains carbon with a carbon-14 to carbon-12 ratio of x10-14 how long ago to the nearest year did the animal live?

8) What is the activity in Curies to 2 decimal places (1 Curie=3.7x1010 decays/sec) of a sample of milligrams of Tritium (T1/2 =12.33 years)?