1. Unit 5 Notes Page 1-2 January 2

2. Welcome back! • Today: • Today you will be able to: • Describe the history of the periodic table • Describe how elements are organized in the periodic table • Periodic Table Activity • Notes

3. Historical Context • The Periodic Table shows every known element • But it wasn’t always how it is today

4. Classical Elements, 450 BCE

5. Funny:

6. “A Table of Chymicall and PhilosophicallCharecters”, 1670

7. Elements, John Dalton, 1608

8. Telluric Screw, 1862

9. Octaves, John Newlands, 1865

10. Periodic Table Activity • ~30 minutes to complete • Groups of 3-4 people • Turn in: • Lab sheet for EACH PERSON • Set of cards for each GROUP • Turn in before end of class today • Keep cards nice, paper clip together and turn in

11. Properties • Some useful vocab: • Allotropic – exists in more than one form • Metalloid – between a metal and nonmetal • Base – opposite of an acid Name Symbol Various Properties ~ Atomic Mass

12. Periodic Table Activity Elements will fit in a square 8 across, 5 down

13. I. History Ch. 5 - The Periodic Table

14. Mendeleev, 1869

15. Modern Periodic Table

16. Sheehan, 1976

17. Alternative Table: “System Québécium”, 2002

18. Alternative Table: Makeyev, 2011

19. As art: Elemental Garden Rebecca Kamen, 2009

20. History of the Periodic Table • Now it’s note-taking time!

21. A. Mendeleev • Dmitri Mendeleev (1869, Russian) • Organized elements by increasing atomic mass • Grouped known elements by their properties • Some discrepancies in placement: • Iodine (127) after Tellurium (128)

22. A. Mendeleev • Dmitri Mendeleev (1869, Russian) • Predicted propertiesof undiscovered elements.

23. B. Moseley • Henry Moseley (1913, British) • Organized by increasing atomic number. • Resolved discrepancies in Mendeleev’s arrangement.

24. II. Organization of theElements

25. Review • Period: • Horizontal • Group/Family: • Vertical

26. A. Metallic Character • Metals • Nonmetals • Metalloids • Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te) B - Big Si - Sized Ge - Gerbils As – Assure Sb - Some Big Te - Teasing

27. B. Blocks • s • p • d • f Main group

28. C. Chemical Reactivity • Families • Similar valence e- within a group result in similar properties • They have similar valence configurations

29. B. Chemical Reactivity • s1 • s2 • d-block • f-block • s2p5 • s2p6 • Alkali Metals • Alkaline Earth Metals • Transition metals • Inner transition metals • Halogens • Noble Gases*

30. Noble Gases • Are unreactive due to their full valence configurations • S2p6 – cannot fit any more electrons in that energy level