( ( In ( moving ( from ( ( ( left ( to ( ( ( right ( across ( ( a period ) ( in ( ( the ( periodic table ) ) ( of ( ( the ( elements ( ( -LRB- ( A -RRB- ) ) ( ionization ( energy decreases ) ) ) ) ) ( -LRB- ( B -RRB- ) ) ) ) ) ) ) ) ) ( atomic ( radius decreases ) ) ) ( -LRB- ( C -RRB- ) ) ) ) ) ( electronegativity decreases ) ) ( -LRB- ( D -RRB- ) ) ) ) ) ) ( ( electron affinity ) ( ( decreases 2 ) . ) ) )
(ROOT (S (PP (IN In) (S (VP (VBG moving) (PP (IN from) (NP (NP (ADJP (JJ left) (PP (TO to) (NP (NP (ADJP (JJ right) (PP (IN across) (NP (NP (DT a) (NN period)) (PP (IN in) (NP (NP (DT the) (JJ periodic) (NN table)) (PP (IN of) (NP (NP (DT the) (JJ elements) (PRN (-LRB- -LRB-) (NP (NNP A)) (-RRB- -RRB-)) (NN ionization) (NN energy) (NNS decreases)) (PRN (-LRB- -LRB-) (NP (NNP B)) (-RRB- -RRB-))))))))) (JJ atomic) (NN radius) (NNS decreases)) (PRN (-LRB- -LRB-) (NP (NNP C)) (-RRB- -RRB-))))) (NN electronegativity) (NNS decreases)) (PRN (-LRB- -LRB-) (NP (NNP D)) (-RRB- -RRB-))))))) (NP (NN electron) (NN affinity)) (VP (VBZ decreases) (NP (CD 2))) (. .)))
In moving from left to right across a period in the periodic table of the elements (A) ionization energy decreases (B) atomic radius decreases (C) electronegativity decreases (D) electron affinity decreases 2.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (PRP we)) (VP (VBP move) (PRT (RP down)) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NNS elements)))) (PP (IN on) (NP (NP (DT the) (JJ periodic) (NN table)) (, ,) (NP (PRP$ their) (NN electronegativity))))))) (NP (PRP it)) (VP (VBZ decreases)) (. .)))