( The ( ( are ( called ( ( one-electron orbitals ) ( -LRB- ( ( often ( called ( hydrogen-like ( atomic orbitals ) ) ) ) -RRB- ) ) ) ) ) . ) )
(ROOT (S (NP (NNP The)) (VP (VBP are) (VP (VBN called) (NP (NP (JJ one-electron) (NNS orbitals)) (PRN (-LRB- -LRB-) (VP (ADVP (RB often)) (VBN called) (NP (JJ hydrogen-like) (JJ atomic) (NNS orbitals))) (-RRB- -RRB-))))) (. .)))
The are called one-electron orbitals (often called hydrogen-like atomic orbitals).
(ROOT (S (NP (DT The) (NN orbital)) (VP (VBZ is) (NP (NP (DT the) (NN area)) (SBAR (WHADVP (WRB where)) (S (NP (DT an) (NN electron)) (VP (VBZ is) (ADJP (RBS most) (JJ likely) (S (VP (TO to) (VP (VB be) (VP (VBN found))))))))))) (. .)))