( ( Although ( ( the atom ) ( is ( built ( from ( ( oppositely charged ) particles ) ) ) ) ) ) ( , ( ( its ( overall charge ) ) ( ( ( is neutral ) ( because ( it ( contains ( ( an ( equal number ) ) ( of ( ( ( positive protons ) and ) ( negative electrons ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (DT the) (NN atom)) (VP (VBZ is) (VP (VBN built) (PP (IN from) (NP (ADJP (RB oppositely) (VBN charged)) (NNS particles))))))) (, ,) (NP (PRP$ its) (JJ overall) (NN charge)) (VP (VBZ is) (ADJP (JJ neutral)) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ contains) (NP (NP (DT an) (JJ equal) (NN number)) (PP (IN of) (NP (NP (JJ positive) (NNS protons)) (CC and) (NP (JJ negative) (NNS electrons))))))))) (. .)))
Although the atom is built from oppositely charged particles, its overall charge is neutral because it contains an equal number of positive protons and negative electrons.
(ROOT (S (SBAR (IN Because) (S (NP (NNS atoms)) (VP (VBP have) (NP (NP (JJ equal) (NNS numbers)) (PP (IN of) (NP (NP (JJ positive) (NNS protons)) (CC and) (NP (JJ negative) (NNS electrons)))))))) (, ,) (NP (PRP they)) (VP (VBP possess) (NP (DT a) (JJ neutral) (NN charge))) (. .)))