I don't understand the mathematical basis of quantum chromodynamics.
Oh, wait. Several people already made a joke like that. Umm... I don't understand the appeal of shows like Real Housewives of New Jersey. But that's mostly because I don't care to understand.
My physics teacher warned me about this, so it's a coincidence you don't like it either. x3
Electronegativity. It's just hard for my to grasp for some reason.
I think I can help.
The nucleii of atoms are positive.
The closer a negative charge, such as an electron, is to the nucleus the stronger the attraction becomes. Just like two magnets become more and more attracted to one another as they get closer together.
Different atoms have different numbers of electrons. A neutral atom has the same number of electrons orbiting it as it does protons in its nucleus.
Most atoms would rather have more or less electrons so that they have a complete outer shell.
Some atoms, like fluorine, only have a few electrons and they have space for another in their outer shell, so other electrons can get fairly close to the positive nucleus. This means fluorine is very good at attracting electrons, just like two magnets will leap to join eachother if you let them get very close to one another.
Larger atoms with lots of electrons around them have a larger distance between their outermost electrons and their nucleus, so they might not be able to hang onto the electrons as easily, just like two magnets which are far away from each other can be easily separated.