( ( An atom ) ( ( is ( ( ( ( made ( of ( ( a ( central nucleus ) ) ( of ( ( electrically neutral ) neutrons ) ) ) ) ) and ) positively ) ( charged ( protons ( circled ( by ( ( negatively charged ) electrons ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (NN atom)) (VP (VBZ is) (VP (VP (VBN made) (PP (IN of) (NP (NP (DT a) (JJ central) (NN nucleus)) (PP (IN of) (NP (ADJP (ADVP (RB electrically)) (JJ neutral)) (NNS neutrons)))))) (CC and) (ADVP (RB positively)) (VP (VBN charged) (SBAR (S (NP (NNS protons)) (VP (VBD circled) (PP (IN by) (NP (ADJP (ADVP (RB negatively)) (VBN charged)) (NNS electrons))))))))) (. .)))
An atom is made of a central nucleus of electrically neutral neutrons and positively charged protons circled by negatively charged electrons.
(ROOT (S (NP (NNS Neutrons)) (VP (VBP are) (ADVP (RB electrically)) (ADJP (JJ neutral))) (. .)))