HI The cell and the nucleus have been in existence for millions of years, but it was only when Robert Brown (1773-1858) came onto the scene that the world found out about the biological database that...
Neutrons have zero charge, so a nucleus with 5 protons and 5 neutrons has the same charge as a nucleus with 5 protons and 6 neutrons: the charge on both is +5.
Electrons have a negative charge, so...