1. Chapter 5 Section 1 History of the Periodic Table pages 133-137 1 Modern Chemistry Chapter 5 The Periodic Law Sections 1-3 History of the Periodic Table Electron Configurations and the Periodic Table Electron Configurations and Periodic Properties

2. Chapter 5 Section 1 History of the Periodic Table pages 133-137 2 Section 1 History of the Periodic Table Chapter 5 Section 1 History of the Periodic Table pages 133-137

3. 3 Section 1 Vocabulary Periodic table Periodic law Lanthanide Actinide Chapter 5 Section 1 History of the Periodic Table pages 133-137 Click on the picture to go to the web site with this Flash Animation.

4. Chapter 5 Section 1 History of the Periodic Table pages 133-137 4 Relative Atomic Mass Stanislao Cannizzaro devised a method for measuring relative atomic mass in 1860. Chapter 5 Section 1 History of the Periodic Table pages 133-137

5. 5 Mendeleev and Chemical Periodicity Mendeleev put names and properties of elements on cards He arranged cards by properties and looked for patterns When elements were in order by atomic mass similarities in properties appeared at regular intervals. Chapter 5 Section 1 History of the Periodic Table pages 133-137

6. 6 Periodic Table Image p. ## Chapter 5 Section 1 History of the Periodic Table pages 133-137

7. 7 Mendeleev and Chemical Periodicity Periodic: occurring at regular intervals 1869: He left spaces in his table and predicted properties of missing elements Sc, Ga & Ge were found with the properties that Mendeleev had predicted Chapter 5 Section 1 History of the Periodic Table pages 133-137

8. 8 Predicted elements image Chapter 5 Section 1 History of the Periodic Table pages 133-137

9. 9 Nendeleev’s Periodic Table p. 134 Chapter 5 Section 1 History of the Periodic Table pages 133-137

10. 10 Moseley and the Periodic Law Moseley put elements in order by increasing nuclear charge Let to the definition of atomic number Periodic Law: The physical and chemical properties of the elements are a periodic function of their atomic numbers. Chapter 5 Section 1 History of the Periodic Table pages 133-137

11. 11 Hubbard’s Periodic Table 1924-1950’s Chapter 5 Section 1 History of the Periodic Table pages 133-137

12. 12 The Modern Periodic Table The periodic table is an arrangement of the elements in order of their atomic number so that elements with similar properties fall in the same column. A web site with many different periodic tables: ChemogenesisChemogenesis Chapter 5 Section 1 History of the Periodic Table pages 133-137

13. 13 Overview of the periodic table animation p. 139 Chapter 5 Section 1 History of the Periodic Table pages 133-137

14. 14 Lego Periodic Table Chapter 5 Section 1 History of the Periodic Table pages 133-137

15. 15 Noble Gases Lord Rayliegh and Sir Ramsey discovered Ar in 1894. In 1868 helium discovered on the sun, but in 1895 it was discovered on earth. Inert, non reactive Fluorine can be forced to make compound with some noble gases. Chapter 5 Section 1 History of the Periodic Table pages 133-137

16. 16 Section 1 Homework Chapter 5 Section 1 History of the Periodic Table pages 133-137