( Neutrons ( , ( ( ( ( ( are electrically ) ( ( neutral particles ) ( of ( atomic nucleus ) ) ) ) , ) ( ( having ( ( a mass ) ( approximately equal ) ) ) ( to ( that ( of protons ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNS Neutrons)) (, ,) (VP (VBP are) (ADVP (RB electrically)) (NP (NP (JJ neutral) (NNS particles)) (PP (IN of) (NP (JJ atomic) (NN nucleus)))) (, ,) (S (VP (VBG having) (NP (NP (DT a) (NN mass)) (ADJP (RB approximately) (JJ equal))) (PP (TO to) (NP (NP (DT that)) (PP (IN of) (NP (NNS protons)))))))) (. .)))
Neutrons, are electrically neutral particles of atomic nucleus, having a mass approximately equal to that of protons.
(ROOT (S (NP (NNS Neutrons)) (VP (VBP are) (ADVP (RB electrically)) (ADJP (JJ neutral))) (. .)))