chem,,其實咩係electronegativity ar?

electronegativity is the ability of an atom to attract the electron in chemical bond.

In Form4, 5 and 6 we usually Pauling's scale

In From 7 inorganic chemistry, we may use Allred-Rochow scale.

F is the most electronegative element, then is oxygen > nitrogen and Chlorine > Bromine

For example H-Cl, CI is more electronegative than H, then Cl carries a partial negative charge and H carries a partial positive charge.

F-O-F, F is more electronegative than O, then F carries a partial negative charge and O carries a partial positive charge.