1. The periodic Table
8.P.1.1

2. WARM UP Which particles of an atom can be found in the nucleus
A. Proton
B. Electron
C. Neutron
How many total electrons does Argon have?
Draw a Lewis Dot Diagram for Argon.

3. Video
Periodic table

4. PERIODIC TABLE
Dmitri Mendeleyev- a Russian chemist classified elements according to their properties
Chemical symbols- composed of one or two letters
First letter is always capital, second is lower case

5. Periodic table Atomic number- the number of protons in nucleus
mass
Atomic number- the number of protons in nucleus
#of protons =#of electrons
Atomic Mass- #of protons + #of neutrons

6. Periodic Table Periodic table organizes information about the elements
Today it is organized by atomic number
Horizontal rows on the periodic table are called periods
Vertical columns are called groups

7. Groups 18

8. Periods