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