<P> In quantum mechanics , an excited state of a system ( such as an atom , molecule or nucleus ) is any quantum state of the system that has a higher energy than the ground state ( that is , more energy than the absolute minimum ) . Excitation is an elevation in energy level above an arbitrary baseline energy state . In physics there is a specific technical definition for energy level which is often associated with an atom being raised to an excited state . The temperature of a group of particles is indicative of the level of excitation ( with the notable exception of systems that exhibit negative temperature ) . </P>
<P> In quantum mechanics , an excited state of a system ( such as an atom , molecule or nucleus ) is any quantum state of the system that has a higher energy than the ground state ( that is , more energy than the absolute minimum ) . Excitation is an elevation in energy level above an arbitrary baseline energy state . In physics there is a specific technical definition for energy level which is often associated with an atom being raised to an excited state . The temperature of a group of particles is indicative of the level of excitation ( with the notable exception of systems that exhibit negative temperature ) . </P>
explain the difference between ground state and excited state for an atom
explain the difference between ground state and excited state for an atom
higher energy than the ground state more energy than the absolute minimum
higher energy than the ground state more energy than the absolute minimum