( ( ( electron ( A ( subatomic particle ) ) ) ( with ( a ( negative charge ) ) ) ) . )
(ROOT (S (VP (VB electron) (NP (DT A) (JJ subatomic) (NN particle)) (PP (IN with) (NP (DT a) (JJ negative) (NN charge)))) (. .)))
electron A subatomic particle with a negative charge.
(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)))))))) (. .)))