Energy Levels
Surrounding a cell core of an atom are energy levels that the electron occupy. An electron have to reside in one of these levels, not between them. They start filling the lowest energy levels first, those closest come the nucleus, and continue away from the nucleus filling greater energy levels. Us often show these power levels together concentric circles approximately the cell core of an atom. This is not a representation of the physical place of the electron in the atom. It represents the average power of the electron in a provided level.When every one of the electrons space in the shortest state possible we say the the atom is in its ground state. When they are not in the lowest possible energy level, us say the atom is in one excited state.You are watching: Emission of light from an atom occurs when an electron

Absorption and also Emission
An atom transforms from a ground state to an excited state by taking on energy from its next site in a procedure called absorption. The electron absorbs the energy and jumps to a greater energy level. In the turning back process, emission, the electron return to the floor state by publication the extra energy it absorbed.

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Note two shining lines show up at specifically the very same wavelength as the light that was absorbed.The most studied atom is the hydrogen atom.