this programe...

2. If an atom loses or gains electrons, the charges no longer
balance. An atom that loses or gains electrons becomes IONS.
IONIC BONDING

3. Compounds made from ions of different elements are ionic
compounds. We refer to the strong forces of attraction between
the oppositely charged ions as ionic bonds.
IONIC BONDING

7. Metals atoms can often lose
electrons. We can think of
metals as positive ions in a sea
of negative electrons. The forces
of attraction between the
opposite charges hold the metal
together. We call this metallic
bonding. The more charges, the
stronger the bonds.

8. Metals conduct electricity because the electrons can move. Ionic
compounds also conduct electricity if the ions can move (for
example, when dissolved or molten).
If you apply a voltage ( a potential difference) between two
points on a piece of metal, electrons will flow in the same
direction. The flow of electrons transfers energy and forms an
electrical current.