( ( ( D ( H ( 0 f ) ) ) ( -LRB- ( ( ( anion , ) g ) -RRB- ) ) ) ( ( For ( most atoms ) ) ( , ( ( ( the repulsion ) ( of ( ( the ( electronic cloud ) ) ( for ( an ( incoming electron ) ) ) ) ) ) ( ( is ( ( large enough ) ( that ( ( the electron ) ( affinity ( ( ( ( is positive ) or ) ( , ( ( if negative ) , ) ) ) ( ( is not ) ( sufficiently ( large ( to ( ensure ( a ( ( stable isolated ) anion ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (NP (NNP D) (NNP H) (NNP 0) (NNP f)) (PRN (-LRB- -LRB-) (NP (NP (NN anion)) (, ,) (NP (NN g))) (-RRB- -RRB-))) (PP (IN For) (NP (JJS most) (NNS atoms))) (, ,) (NP (NP (DT the) (NN repulsion)) (PP (IN of) (NP (NP (DT the) (JJ electronic) (NN cloud)) (PP (IN for) (NP (DT an) (JJ incoming) (NN electron)))))) (VP (VBZ is) (ADJP (JJ large) (RB enough) (SBAR (IN that) (S (NP (DT the) (NN electron)) (ADVP (RB affinity)) (VP (VP (VBZ is) (ADJP (JJ positive))) (CC or) (PRN (, ,) (SBAR (IN if) (FRAG (ADJP (JJ negative)))) (, ,)) (VP (VBZ is) (RB not) (ADJP (RB sufficiently) (JJ large) (S (VP (TO to) (VP (VB ensure) (NP (DT a) (ADJP (JJ stable) (JJ isolated)) (NN anion)))))))))))) (. .)))
D H 0 f (anion,g) For most atoms, the repulsion of the electronic cloud for an incoming electron is large enough that the electron affinity is positive or, if negative, is not sufficiently large to ensure a stable isolated anion.
(ROOT (S (NP (NNS Electrons)) (ADVP (RB always)) (VP (VBP result) (PP (IN in) (NP (NP (DT an) (NN anion)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (ADJP (JJR larger)) (PP (IN than) (NP (DT the) (NN parent) (NN atom)))))))))) (. .)))