
IG7 Page 7
ment through the air is called ‘ionic flow’.
Instead of the electron from the balloon floating through the air all by itself, it
is “grabbed” by a passing neutral air molecule. The air molecule acquires a
negative charge which is the same as the balloon that has not yet lost all of it’s
electrons. Since these charges are alike, they repel. Given that the air mole-
cule is mobile, it moves away from the like charged balloon along with the ex-
tra electron. The positive charge on the ceiling close by causes the air mole-
cule to become attracted to it. The closer the molecule gets to the ceiling, the
more attractive force becomes on it. Suddenly the molecule bumps into the
surface of the ceiling where there is a paint particle with a missing electron.
The air molecule “hands off” the extra electron and continues on its random
way with its now neutral charge and the paint particle on the ceiling as a result
becomes neutrally charged as well.
Below are a few simplistic diagrams showing how ions are created:
1. Two atoms in their neutral states.
2. The two atoms contact each other and one of the
valence electrons is “captured” by the atom on the left.
3. The atom on the left now has a net charge of –1, and
the one on the right has +1.
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