The Role of Electons
~Electron Shells ~Ions ~Periosic table ~Valence electrons
~Atoms are electrically neutral because the number of electrons and equal to the number of__.
~If this balance is changed, then we call the atoms charged and it's called an Ion.
~Ions form during a chemical reaction as electrons move from atoms to atom.
~If an atom loses an electron it's called an positive ion.
~if an atom gains an electron it's called negative ion.