• The term dilute refers to a solution that has a relatively small amount of solute in comparison to the amount of solvent.

• Concentrated, on the other hand, refers to a solution that has a relatively large amount of solute in comparison to the solvent.

• the transmutation—creation of one element from another

• Alpha Emission: An alpha particle is a helium nucleus with two protons and two neutrons.

• Gamma Emission: Gamma emission is the giving off of high-energy, short-wavelength photons similar to X-rays.

• Positron Emission: A positron is essentially an electron that has a positive charge instead of a negative one.

• Electron Capture: The four decay modes described above all involve the emission or giving off a particle; electron capture is the capturing of an electron from the energy level closest to the nucleus(1s) by a proton in the nucleus.

Nuclear decay calculations: