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Warm Up Question
– Name the three subatomic particles.
– List anything you think you might know
about them.
Matter &
The Atom
Matter
Anything that has
mass and takes up
space (has volume)
Made up of different
kinds of atoms
All matter is made of atoms
Atomic Structure
Atomic
Structure
Inside
Nucleus
Protons
Neutrons
Outside Nucleus-Electrons
Atomic Structure
Tiny
Electrons
Negative charge
Move outside the nucleus
Atomic Structure
Big
Protons
Positive charge
Inside the nucleus
Atomic Structure
Big
Neutrons
No charge: neutral
Inside the nucleus
Atomic Structure
energy level
protons
+
electrons
+
neutrons
-
nucleus
Describing Atoms
Atomic Number = # of protons
the # of protons = the # of electrons
Atomic Mass Number = protons +
neutrons.
Valence Electrons: Only the
electrons in the outer shell of an
atom
Think About It…
Make a Brace Map of an Atom. Break it
down into its three subatomic particles
and list a few characteristics of each.
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