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The heat of the flame gives off energy to the ions. This results in electrons jumping out of their ground state and into their excited state. From a lower subatomic level to a higher one. When the electrons fall back down, the give off a color.
Yes
Most. Electrons can (relatively easily) absorb energy and move to a higher energy band and they can emit energy (usually a photon) and drop to a lower energy level.
the first energy levels hold 2, 8, and 18 a total of 28 electrons
high-energy subatomic particles
isotope.
radioactivity
radioactivity
Radiation
Radiation
Energy in a certain manifestation that is able to interact with other manifestations of energy.