What is the process in which a nucleus of an atom breaks up, emitting subatomic particles and/or energy?

The process in which a nucleus of an atom breaks up, emitting subatomic particles and/or energy is called radioactive decay. This process always involve a nuclear fission reaction and is a spontaneous process. Fission reaction is one type of nuclear reaction. This type occurs when a nuclei is being divided. Fission reaction takes place in any of the heavy nuclei after capture of a neutron. The process of radioactive decay would always discharge a particle such as alpha, gamma, beta, positron or neutron. It is a process where there is a loss of the elementary particles from the unstable nucleus of an atom.

Alkaline earth metals are found in group 2 of the periodic table.

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.