( ( ( a type ) ( of ( weak ( chemical bond ) ) ) ) ( ( formed ( when ( ( ( the ( ( slightly positive ) ( hydrogen atom ) ) ) ( of ( a ( polar ( covalent bond ) ) ) ) ) ( is ( attracted ( to ( ( the ( ( slightly negative ) atom ) ) ( of ( a ( polar ( covalent bond ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT a) (NN type)) (PP (IN of) (NP (JJ weak) (NN chemical) (NN bond)))) (VP (VBD formed) (SBAR (WHADVP (WRB when)) (S (NP (NP (DT the) (ADJP (RB slightly) (JJ positive)) (NN hydrogen) (NN atom)) (PP (IN of) (NP (DT a) (JJ polar) (NN covalent) (NN bond)))) (VP (VBZ is) (VP (VBN attracted) (PP (TO to) (NP (NP (DT the) (ADJP (RB slightly) (JJ negative)) (NN atom)) (PP (IN of) (NP (DT a) (JJ polar) (NN covalent) (NN bond)))))))))) (. .)))
a type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond is attracted to the slightly negative atom of a polar covalent bond.
(ROOT (S (NP (NN Hydrogen) (NN chloride)) (VP (VBZ is) (NP (DT a) (JJ covalent) (NN compound))) (. .)))