( ( Ionic bonding ) ( ( is ( common ( between ( pairs ( of ( ( atoms , ) ( where ( ( one ( of ( the pair ) ) ) ( is ( ( ( ( a metal ) ( of ( ( low electronegativity ) ( -LRB- ( ( such ( as sodium ) ) -RRB- ) ) ) ) ) and ) ( ( the ( ( second a ) nonmetal ) ) ( of ( ( high electronegativity ) ( -LRB- ( ( such ( as chlorine ) ) -RRB- ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Ionic) (NNP bonding)) (VP (VBZ is) (ADJP (JJ common) (PP (IN between) (NP (NP (NNS pairs)) (PP (IN of) (NP (NP (NNS atoms)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (NP (CD one)) (PP (IN of) (NP (DT the) (NN pair)))) (VP (VBZ is) (NP (NP (NP (DT a) (NN metal)) (PP (IN of) (NP (NP (JJ low) (NN electronegativity)) (PRN (-LRB- -LRB-) (PP (JJ such) (IN as) (NP (NN sodium))) (-RRB- -RRB-))))) (CC and) (NP (NP (DT the) (ADJP (RB second) (DT a)) (NN nonmetal)) (PP (IN of) (NP (NP (JJ high) (NN electronegativity)) (PRN (-LRB- -LRB-) (PP (JJ such) (IN as) (NP (NN chlorine))) (-RRB- -RRB-))))))))))))))) (. .)))
Ionic bonding is common between pairs of atoms, where one of the pair is a metal of low electronegativity (such as sodium) and the second a nonmetal of high electronegativity (such as chlorine).
(ROOT (S (NP (NP (JJ Ionic) (NNS bonds)) (PP (IN between) (NP (CD two) (NNS atoms)))) (VP (VBP require) (NP (NP (CD one) (NN metal)) (CC and) (NP (CD one) (NN nonmetal)))) (. .)))