However, for O and N the opposite is predicted! While the partial charge of O decreases from -0.83 to -0.91 and N from -0.57 to -0.62 (Table ) upon formation of the urea crystal, the electronegativity of these atoms increases. We have made a similar prediction in the case of nucleobase pairing where also H is oxidized while becoming less electronegative. These examples again serves to remind that whereas quantifications of partial charge may be useful for approximating where electrons move, in situ electronegativity tells a different story: it reveals how well electrons are bound in different locations.