Nucleus does not have electrons in it. It contain protons and neutrons.
the electrons
None - because electrons are part of the atom.
Do you mean the electrons? They have a negative charge
Depends, but it is probably electron
Valence electrons occur in the outermost energy level, or valence shell, of an atom. These electrons are involved in the formation of chemical bonds and determining the atom's reactivity and chemical properties.
electrons
The Protons (in the nucleus).
Electrons - the valence electrons
The electrons
An atom has a negative part (called electrons) because it has a positive part also (called protons), so the electrons make it electrically neutral.
The electrons
Electron