( ( Like ( ( an ( activated electron ) ) ( at ( a ( higher ( orbital shell ) ) ) ) ) ) . )
(ROOT (FRAG (PP (IN Like) (NP (NP (DT an) (VBN activated) (NN electron)) (PP (IN at) (NP (DT a) (JJR higher) (JJ orbital) (NN shell))))) (. .)))
Like an activated electron at a higher orbital shell.
(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))))))))))) (. .)))