( ( Electron ( A ( sub-atomic particle ) ) ) ( ( found ( orbiting ( ( the nuclei ) ( of ( an atom ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Electron)) (NP (DT A) (JJ sub-atomic) (NN particle))) (VP (VBD found) (S (VP (VBG orbiting) (NP (NP (DT the) (NN nuclei)) (PP (IN of) (NP (DT an) (NN atom))))))) (. .)))
Electron A sub-atomic particle found orbiting the nuclei of an atom.
(ROOT (S (NP (JJ Atomic) (NNS orbitals)) (VP (VBP are) (ADJP (VBN populated) (PP (IN with) (NP (NP (JJ subatomic) (NNS particles)) (VP (VBN known) (PP (IN as) (NP (NNS electrons)))))))) (. .)))