( Normally ( , ( electrons ( ( ( ( exist ( in ( the ( ground state ) ) ) ) , ) ( meaning ( they ( occupy ( ( ( the ( lowest ( energy level ) ) ) possible ) ( -LRB- ( ( ( the ( electron ( shell closest ) ) ) ( to ( the nucleus ) ) ) -RRB- ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Normally)) (, ,) (NP (NNS electrons)) (VP (VBP exist) (PP (IN in) (NP (DT the) (NN ground) (NN state))) (, ,) (S (VP (VBG meaning) (S (NP (PRP they)) (VP (VB occupy) (NP (NP (DT the) (JJS lowest) (NN energy) (NN level)) (ADJP (JJ possible)) (PRN (-LRB- -LRB-) (NP (NP (DT the) (JJ electron) (NN shell) (JJS closest)) (PP (TO to) (NP (DT the) (NN nucleus)))) (-RRB- -RRB-)))))))) (. .)))
Normally, electrons exist in the ground state , meaning they occupy the lowest energy level possible (the electron shell closest to the nucleus).
(ROOT (S (NP (DT An) (NN electron)) (VP (VBZ moves) (PP (TO to) (NP (NP (DT a) (NN shell)) (ADVP (RB farther) (PP (IN from) (NP (DT the) (NN nucleus)))))) (SBAR (IN after) (S (NP (PRP it)) (VP (VBZ absorbs) (NP (NN energy)))))) (. .)))