warm up question

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.