( ( ( A unit ) ( of ( ( ( energy ( that ( is ( convenient ( to ( use ( on ( the ( atomic scale ) ) ) ) ) ) ) ) ) , ) ( equal ( to ( ( the amount ) ( of work ) ) ) ) ) ) ) ( ( required ( to ( ( move ( ( ( ( an electron ) , ) ( with ( its ( negative charge ) ) ) ) , ) ) ( through ( ( an ( electrical potential ) ) ( of ( ( ( one volt ) , ) ( ( 1.6 x ) ( 10 ( -19 joules ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN unit)) (PP (IN of) (NP (NP (NN energy)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ convenient) (S (VP (TO to) (VP (VB use) (PP (IN on) (NP (DT the) (JJ atomic) (NN scale)))))))))) (, ,) (VP (JJ equal) (PP (TO to) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN work))))))))) (VP (VBD required) (S (VP (TO to) (VP (VB move) (NP (NP (DT an) (NN electron)) (, ,) (PP (IN with) (NP (PRP$ its) (JJ negative) (NN charge))) (, ,)) (PP (IN through) (NP (NP (DT an) (JJ electrical) (NN potential)) (PP (IN of) (NP (NP (CD one) (NN volt)) (, ,) (NP (NP (QP (CD 1.6) (CD x))) (NP (CD 10) (CD -19) (NNS joules))))))))))) (. .)))
A unit of energy that is convenient to use on the atomic scale, equal to the amount of work required to move an electron, with its negative charge, through an electrical potential of one volt, 1.6 x 10 -19 joules.
(ROOT (S (NP (NP (DT The) (NN difference)) (PP (IN in) (NP (NP (JJ electric) (JJ potential) (NN energy)) (SBAR (WHNP (WDT which)) (S (VP (VBZ allows) (PP (IN for) (NP (DT an) (JJ electric) (NN charge))) (S (VP (TO to) (VP (VB move) (PP (IN from) (NP (CD one) (NN position))) (PP (TO to) (NP (DT another)))))))))))) (VP (VBZ is) (VP (VBN measured) (PP (IN by) (NP (DT the) (JJ volt) (NN si) (NN unit))))) (. .)))