( ( ( The ( solid state ) ) ( of fluorine ) ) ( ( relies ( on ( Van ( der ( Waals ( forces ( to ( ( ( ( hold molecules ) together ) , ) ( which ( , ( ( because ( of ( ( the ( small size ) ) ( of ( the ( fluorine molecules ) ) ) ) ) ) ( , ( are ( relatively weak ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ solid) (NN state)) (PP (IN of) (NP (NN fluorine)))) (VP (VBZ relies) (PP (IN on) (NP (NNP Van) (NNP der) (NNP Waals) (NNS forces) (S (VP (TO to) (VP (VB hold) (NP (NNS molecules)) (ADVP (RB together)) (, ,) (SBAR (WHNP (WDT which)) (S (, ,) (PP (RB because) (PP (IN of) (NP (NP (DT the) (JJ small) (NN size)) (PP (IN of) (NP (DT the) (NN fluorine) (NNS molecules)))))) (, ,) (VP (VBP are) (ADJP (RB relatively) (JJ weak))))))))))) (. .)))
The solid state of fluorine relies on Van der Waals forces to hold molecules together, which, because of the small size of the fluorine molecules, are relatively weak.
(ROOT (S (NP (NNP Solid)) (VP (VBZ is) (VP (VBN characterized) (PP (IN by) (NP (NP (NP (NNS molecules)) (PP (IN with) (NP (JJ minimal) (NN movement)))) (CC and) (NP (NP (JJ strong) (NNS forces)) (PP (IN between) (NP (PRP them)))))))) (. .)))