( ( In ( covalent bonds ) ) ( , ( ( electron pairs ) ( ( are ( ( shared equally ) ( between ( atoms ( of ( equal electronegativity ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (JJ covalent) (NNS bonds))) (, ,) (NP (NN electron) (NNS pairs)) (VP (VBP are) (VP (VBN shared) (ADVP (RB equally)) (PP (IN between) (NP (NP (NNS atoms)) (PP (IN of) (NP (JJ equal) (NN electronegativity))))))) (. .)))
In covalent bonds, electron pairs are shared equally between atoms of equal electronegativity.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NNS electrons)) (VP (VBP are) (VP (VBN shared) (ADVP (RB equally)))))) (, ,) (NP (PRP it)) (VP (VBZ is) (VP (VBN called) (NP (NN nonpolar) (NNS bonds)))) (. .)))