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
Electrons
Tiny
Negative charge
Move outside the nucleus
Atomic Structure
Protons
Big
Positive charge
Inside the nucleus
Atomic Structure
Neutrons
Big
No charge: neutral
Inside the nucleus
energy levelenergy level
nucleunucleuss
electronelectronss
+ +
++
protonsprotons
neutronneutronss
--
--
Atomic StructureAtomic Structure
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.