Periodic Table of Elements

Elements are types of atoms!

• Elements can not be broken down into simpler substances.

• Everything is made of matter = atoms.

What do atoms look like?• Protons (+)

– Positive charge– Located in the nucleus– The number of protons = the

signature of the atom.

• Neutrons – No charge– Located in the nucleus

• Electrons (-)– Negative charge– Located in the electron cloud

(electron orbitals)• 2, 8, 18, 36

– Super small compared to protons and neutrons.

What makes one type of atom different from another?

What does the periodic table tell you?

• Atomic Number = Number of Protons– Tells what type of atom

you have.– Tells the number of

electrons in an electrically neutral atom.

• Atomic Mass = # of protons + # of neutrons– Mass of nucleus

Protons = ____________

Neutrons= ___________

Electrons =___________Draw the Bohr Model

Protons = ___________

Neutrons = __________

Electrons = ___________Draw the Bohr Model