There is a little thing that I am sure about temperature (and how it affect energy level) so I made assumptions. But do not know if they are correct or not
From what I know - Temperature = constant heat supplied (constant energy supplied). - Temperature does not exist when temperature is 0 kelvin (absolute zero), which means no temperature => This explain why atoms still move at room temperature because there is always energy supplied from "temperature" or heat supplied. The more heat is supplied, the faster the atoms move. The only case that has no "temperature"/ "energy supply"/ "heat supply" is 0 kelvin (absolute zero) .
=> If we heat an atom to some point, it's excited. But afterwards, it is in its ground state again.
So from what I know, there are 3 things unclear to me.
1) Temperature = Constant source of energy supply = constant source of heat supply. This is the reason why we say that in the natural environment, atom will not stop moving ( As there is a constant source of energy supply).
2) "If we heat an atom to some point, it's excited. But afterwards, it is in its ground state again". --> In this case, we can fix the problem, we can make the atom always excited by constantly heating it or another way (this way I am not sure) is put in an environment with the suitable temperature that can make it "always" excited.
==> According to what I see, the method of heating is temporary but the method of putting it in an assuming environment with suitable temperature is a forever method (theoretically)
3) If the temperature is 0 Celsius there still exists temperature. But if the temperature is 0 K, theoretically, there will be no energy or heat supplied, making the atom stop moving (although electron still move as cloud of electrons). Am I correct ? Many thanks.