( ( Although ( ( no chalcogen ) ( is ( ( ( ( extremely electropositive ) , ) nor ) ( ( quite ( as ( electronegative ( as ( the ( halogen fluorine ) ) ) ) ) ) ( -LRB- ( ( the ( ( most electronegative ) element ) ) -RRB- ) ) ) ) ) ) ) ( , ( there ( ( is ( ( a ( large difference ) ) ( in ( ( ( ( electronegativity ( between ( the top ) ) ) ( -LRB- ( ( oxygen ( = 3.44 ) ) -RRB- ) ) ) and ) ( ( bottom ( -LRB- ( ( polonium ( = 2.0 ) ) -RRB- ) ) ) ( of ( the group ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (DT no) (NN chalcogen)) (VP (VBZ is) (ADJP (ADJP (RB extremely) (JJ electropositive)) (, ,) (CC nor) (ADJP (ADJP (RB quite) (RB as) (JJ electronegative) (PP (IN as) (NP (DT the) (NN halogen) (NN fluorine)))) (PRN (-LRB- -LRB-) (NP (DT the) (ADJP (RBS most) (JJ electronegative)) (NN element)) (-RRB- -RRB-))))))) (, ,) (NP (EX there)) (VP (VBZ is) (NP (NP (DT a) (JJ large) (NN difference)) (PP (IN in) (NP (NP (NP (NN electronegativity)) (PP (IN between) (NP (DT the) (NN top)))) (PRN (-LRB- -LRB-) (VP (VBN oxygen) (S (VP (SYM =) (NP (CD 3.44))))) (-RRB- -RRB-)) (CC and) (NP (NP (NP (NN bottom)) (PRN (-LRB- -LRB-) (NP (NNP polonium) (QP (CD =) (CD 2.0))) (-RRB- -RRB-))) (PP (IN of) (NP (DT the) (NN group)))))))) (. .)))
Although no chalcogen is extremely electropositive, nor quite as electronegative as the halogen fluorine (the most electronegative element), there is a large difference in electronegativity between the top (oxygen = 3.44) and bottom (polonium = 2.0) of the group.
(ROOT (S (NP (NNP Oxygen)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (DT the) (JJ second) (ADJP (RBS most) (JJ electronegative)) (NN element))))) (. .)))