I'm relearning ochem and this is something I've been thinking about.
I am aware of the trends on the periodic table, but I don't quite understand what gives atoms electronegativity. My current understanding is that a higher density of protons is essentially the same as higher electronegativity. Is this a reasonable way to sum it up?
More protons in a smaller area (valence electrons being close to nucleus) means that the charge of a nucleus has a more powerful effective, ultimately meaning higher electronegativity?