The nucleus contains protons . Each proton carries a single positive electric charge. The atomic number is the number of protons in the nucleus. Electrons are outside the nucleus . Each electron has a single negative electric charge.
Electricity is the flow of electrons in wires.
This gives atoms an overall charge of zero. Electronic Structure Atoms have shells available for electrons. Electrons fill the innermost shells first. This gives them the most stable electronic structure. Atoms with only one or two electrons in their outer shells lose them easily.