It is given off
Photons
orbital electrons
Energy (in the form of photons) is given off when electrons in an atom fall to a lower energy level.
E=hv
Light.
it is its energy emitted by electrons while moving from higher energy state to lower one.
Electrons are given energy because of the work done by the attractive or repulsive force, when they reach the place where they meet positive charges, they give off (release) their energy.
Energy -- usually in the form of light (or more generally, electromagnetic radiation).
when a negative ion forms electrons are gained and energy is given off and when a positive ion forms electrons are lost and energy is used.
Combustion, burning, releases more heat that is taken in to start the reaction.
Exothermic Reaction
energy is given out. this is emitted in the form light ie each atom has its own characteristic emission spectra.