( Subatomic ( ( Particles ( ( ( The ( three particles ) ) ( that ( ( make up ) atoms ) ) ) ( are ( ( ( ( ( protons , ) neutrons ) , ) and ) electrons ) ) ) ) . ) )
(ROOT (S (NP (NNP Subatomic)) (VP (VBZ Particles) (SBAR (S (NP (NP (DT The) (CD three) (NNS particles)) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (PRT (RP up)) (NP (NNS atoms)))))) (VP (VBP are) (NP (NP (NNS protons)) (, ,) (NP (NNS neutrons)) (, ,) (CC and) (NP (NNS electrons))))))) (. .)))
Subatomic Particles The three particles that make up atoms are protons, neutrons, and electrons.
(ROOT (S (NP (NP (DT The) (NN number)) (PP (IN of) (NP (NNS neutrons)))) (VP (MD can) (VP (VB vary) (PP (IN between) (NP (NP (NNS atoms)) (PP (IN of) (NP (DT the) (JJ same) (NN element))))))) (. .)))