<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>
what is an atom in the excited state
what is an atom in the excited state
any quantum state of the system that has a higher energy than the ground state ( that is , more energy than the absolute minimum )
any quantum state of the system that has a higher energy than the ground state ( that is , more energy than the absolute minimum )