( ( Metallic bonds ) ( ( are ( ( ( variable ( in strength ) ) , ) ( ( giving rise ) ( to ( metals ( such ( as ( ( ( ( mercury ( -LRB- ( ( liquid ( at ( room temperature ) ) ) -RRB- ) ) ) and ) tungsten ) ( -LRB- ( ( ( melts ( at ( 3407 degrees ) ) ) Celsius ) -RRB- ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Metallic) (NNS bonds)) (VP (VBP are) (VP (VBG variable) (PP (IN in) (NP (NN strength))) (, ,) (S (VP (VBG giving) (NP (NN rise)) (PP (TO to) (NP (NP (NNS metals)) (PP (JJ such) (IN as) (NP (NP (NN mercury)) (PRN (-LRB- -LRB-) (ADJP (JJ liquid) (PP (IN at) (NP (NN room) (NN temperature)))) (-RRB- -RRB-)) (CC and) (NP (NN tungsten)) (PRN (-LRB- -LRB-) (NP (ADVP (RB melts) (PP (IN at) (NP (CD 3407) (NNS degrees)))) (NNP Celsius)) (-RRB- -RRB-)))))))))) (. .)))
Metallic bonds are variable in strength, giving rise to metals such as mercury (liquid at room temperature) and tungsten (melts at 3407 degrees Celsius).
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (NP (NP (DT the) (CD one) (NN metal)) (SBAR (WHNP (WDT that)) (S (VP (VBZ melts) (PP (IN below) (NP (NN room) (NN temperature)))))))) (. .)))