What to protons and electrons have in them?

Answer 1

Electrons are a type of fundamental particle known as a Lepton. Protons how ever are made up of quarks. A proton has a quark structure of up, up, down (UUD). The up quark has a charge of +2/3 and the down has -1/3 which gives the proton its overall positive charge. The up and down quark both have a strangeness value of 0 and also make up nearly all of the matter which is common on earth including neurons which have a quark composition of UDD.

Answer 2

A proton consists of three quarks, specifically two up quarks and one down quark, held together by gluons.

An electron is a fundamental particle and cannot be broken down into anything simpler.

(i don't believe there is anything fundamental in the universe. It was once thought atoms were fundamental, then atomic nuclei and electrons, then we found out the nuclei were made of quarks, and quarks and electrons made of strings, and so and so forth. using this logic one could argue that a proton has an entire observable universe in it)

Answer 3

Electrons carry negative charges. Protons carry positive. Both are equal (equivalent to 1.60217646 × 10-19 coulombs), but opposite in charges.