Ch. 5 - The Periodic Table

1
I. History(p. 123 - 127)

• Ch. 5 - The Periodic Table

2
A. Mendeleev

• Dmitri Mendeleev (1869, Russian)
• Organized elements by increasing atomic mass.
• Elements with similar properties were grouped
  together.
• There were some discrepancies.

3
A. Mendeleev

• Dmitri Mendeleev (1869, Russian)
• Predicted properties of undiscovered elements.

4
B. Moseley

• Henry Mosely (1913, British)
• Organized elements by increasing atomic number.
• Resolved discrepancies in Mendeleevs arrangement.

5
II. Organization of theElements

• Ch. 5 - The Periodic Table

6
A. Metallic Character

• Metals
• Nonmetals
• Metalloids

7
B. Blocks

• Main Group Elements
• Transition Metals
• Inner Transition Metals