A Boron -12 atom ( 12.01435u) beta -decays into a carbon atom ( 12.00000 u). What is the maximum kinetic energy of the emitted electron? ( Hint:  the kinetic energy of the electron will be the maximum if the antineutrino kas zero energy).

Write the appropriate symbol (with A, Z and the element symbol) for an yttrium isotope that has 39 protons and 50 neutrons in its nucleus.

The nucleus of a lithium atom is 3 ^ 7 Li and its mass is 7.0160 amu. Calculate the binding energy in MeV. The relevant masses are, for the neutron, 1.0087 amu, and the proton 1.0073 amu. 1 amu is equivalent to 931 MeV

When a nucleus decays, the daughter nucleus can be in an excited state. The 93/43Tc nucleus (molar mass 92.910 2 g/mol) in the ground state decays by electron capture and e+ emission to energy levels of the daughter (molar mass 92.906 8 g/mol in the ground state) at 2.44 MeV, 2.03 MeV, 1.48 MeV, and 1.35 MeV. (a) Identify the daughter nuclide. (b) To which of the listed levels of the daughter are electron capture and e+ decay of 93/43Tc allowed?