( ( ( ( eV ( Electron volt ) ) , ) ( ( a measure ) ( of ( ( the energy ) ( of ( subatomic particles ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP eV) (NNP Electron) (NNP volt)) (, ,) (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN energy)) (PP (IN of) (NP (JJ subatomic) (NNS particles)))))) (. .)))
eV Electron volt, a measure of the energy of subatomic particles.
(ROOT (S (NP (DT A) (NN redox) (NN reaction)) (VP (VBZ rearranges) (NP (NP (DT the) (JJ subatomic) (NNS particles)) (VP (VBN known) (PP (IN as) (NP (NNS electrons)))))) (. .)))