Acertain oxygen atom has the electron configuration 1s22s22px22py2. how many unpaired electrons are present? 2 incorrect: your answer is incorrect. is this an excited state of oxygen? yes no in going from this state to the ground state would energy be released or absorbed? neither, the oxygen atom is in the ground state. energy would be absorbed. energy would be released.

From the electron configuration, this might be the ground state. There are no unpaired electrons. There is a certain stability from spin-paired electrons that may over-ride Hund's Rule, and it may take energy to go to unpaired electrons, which might be induced in an excited state. UNPAIRED ELECTRON: a single electron in an orbital. For oxygen, this would have the electron configuration 1s2,2s2, 2px2, 2py1,2pz1.

The sun's corona can be seen during a solar eclipse.