system
Given the following post, respond as if you're commenting on Reddit:
human
Why does an electron, a particle ~1/1837 the size of a proton, have a negative charge that balances out the positive charge of a proton?

Is a negative charge stronger per amu than a positive charge. I am confused as to why electrons and protons would not be the same size with opposite charges. 

EDIT: Thanks for all the responses guys!
gpt
To add another wrinkle to this, while electrons are (as far as we know) fundamental particles, protons are not.  

A protons consists of two up quarks and one down quark.  Up quarks have a charge that is +2/3 e, and down quarks have a charge that is -1/3 e.  That is to say, an up quark has a positive charge of the same strength as 2/3 of an electron, and a down quark has a negative charge that is 1/3 the strength of an electron.  All together, you get 2/3 + 2/3 - 1/3 = 1, so a proton ends up with the same charge strength, but opposite polarity, as an electron.