1. September 25, 2013 • When the bell rings voices are at zero, working on the DO NOW ( All electronics away!!) • Pick up daily handouts (There is an extra at the front of the room on a stool – get that one too!) • Pick up turned back docs • Turn in any LATE reports (M&M, Beanium, Nuclear Energy, Chemistry in a Bag) Vocab Corrections • DO NOT TURN ANYTHING IN UNLESS STATED ABOVE • HAVE OUT YOUR REFERENCE TABLE • Start on the Do Now in your Do Now form DO NOW 9/25/13 Work on the Magic Squares handout you picked up, in your form write “magic squares handout”

2. Do Now Review DO NOW 9/25/13 Magic Squares handout

3. Homework WANTED! Periodic Table Project Due 9/30 Vision Learning Chemical Bonding Module **Quiz must be complete by the time you come to class FRIDAY 9/27** Graded***

4. Upcoming Dates • 9/25/2013 Empirical Formula QUIZ • 9/27/2013 Bohr Model Quiz • 9/27/2013 Lab Class (Dress appropriately, bring composition notebook, safety contract) • 9/30/2013 Electron / Periodic Properties Test • 9/30/2013 Periodic Table Wanted Poster Due

5. Tutoring • Tuesday 2:30-3:30 in room 529 • NO TUTORING THURSDAY – Test retakes and make ups ONLY

6. Remind 101 • 1st and 4th text @murfchemhn to (336)554-7294 • 3rd text @murfchem to (336)554-7294

7. Valence Electrons: ELECTRONS AVAILABLE FOR BONDING

8. Definition Valence electrons are electrons in the outmost shell (energy level). They are the electrons available for bonding.

9. Group 1 (alkali metals) have 1 valence electron

10. Group 2 (alkaline earth metals) have 2 valence electrons

11. Group 13 elements have 3 valence electrons

12. Group 14 elements have 4 valence electrons

13. Group 15 elements have 5 valence electrons

14. Group 16 elements have 6 valence electrons

15. Group 17 (halogens) have 7 valence electrons

16. Group 18 (Noble gases) have 8 valence electrons, except helium, which has only 2

17. Transition metals (“d” block) have 1 or 2 valence electrons

18. Lanthanides and actinides (“f” block) have 1 or 2 valence electrons

19. Dot Notations An atom’s valence electrons can be represented by Lewis dot notations.

20. Dot Notations – Period 2 Lewis dot notations for the valence electrons of the elements of Period 2.

21. Lewis Dot Practice • Lewis Dot handout

22. Poll Anywhere • Of the following elements which would have the largest radius? • Lithium (Li) atomic #3 • Nitrogen (N) atomic #7 • Neon (Ne) atomic #10 • Boron (B) atomic #5

23. Poll Anywhere • As one moves from down ( ↓ ) a group on the periodic table, the electronegativity of the elements encountered tends to:   • stay the same   •     increase   •     decrease

24. Poll Anywhere • The elements with the smallest atomic radii are found in the:   • upper right-hand corner of the periodic table  •     upper left-hand corner of the periodic table  •     lower left-hand corner of the periodic table   •   lower right-hand corner of the periodic table

25. Poll Anywhere • Cations have a ______________ charge and are ______________ than the atoms from which they formed.  •     negative/smaller  •     positive/larger  •     positive/smaller  •     negative/larger

26. Poll Anywhere • A vertical column of elements on the periodic table can also be referred to as • Family • Group • period • series

27. Poll Anywhere • Generally speaking the group of elements with the highest first ionization energy is • Group 17 • Group 1 • Group 16 • Group 18

28. Poll Anywhere • Elements with the smallest atomic radii are found in the : • Lower left-hand corner of the Periodic table • Lower right-hand corner of the PT • Upper left-hand corner of the PT • Upper right-hand corner of the PT

29. Poll Anywhere The energy required to remove an electron from an atom is known as • Radioactivity • Electron Affinity • Ionization energy • Electronegativity

30. Hands up Pair Up! • Periodic Trends handout

31. I have, Who has? • Review!