Atom

1
Atom Basic unit of matter. Made of
Protons positive () charge Neutrons neutral
(no) charge Electrons negative (-) charge
Atomic Number The number of protons in the
nucleus
2
Element All of the atoms in a substance are
alike. (Gold, Silver, Copper, Aluminum)
Compound Different atoms or elements
combine to make a substance. (Salt, water,
sugar, plastics)
3
Valence electrons Electrons in the outer
shell.
Ions Charged atoms Has either extra or lack of
electrons.
Free electrons Electrons not around the nucleus
any longer This is what we see as ELECTRICITY!
4
Static Electricity (electrostatic energy) When
there are no movement of electrons from one
object to another. (Magnetism)
http//electronics.howstuffworks.com/photocopier1.
htm
Uses Car painting Air Cleaning Filters Power
coating Abrasive Paper Electrostatic Printing
(Photocopy)