Why an atom is electrically neutral ?
The number of protons with 1+ charge = the number of electrons with a 1- charge.
Say you look at Na, atomic number 11 so it has 11 protons and 11 electrons.
11+ + (-11) = 0
Say you look at Na, atomic number 11 so it has 11 protons and 11 electrons.
11+ + (-11) = 0