An atom has the same number of electrons as it does protons, and the number of protons determines what element it is.
The number of electrons depends on what type of atom it is.
A Mercury atom has 80 electrons.
A nitrogen atom has seven electrons.
An atom's atomic number is the number of electrons.
The neutral atom of potassium has 19 electrons.
Helium atom has 2 electrons.
The neutral atom of phosphorus has 15 electrons in the atom.
The chlorine atom has 17 protons and electrons.
There are 17 electrons i a neutral atom of chlorine.
There are 5 valence electrons in the atom phosphorus.
The neutral atom of sodium has 11 electrons.
If there are excess electrons in an atom, the atom is likely to be ionized; that is, the stom will emit the electrons.