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 formDO NOW 9/25/13Work on the Magic Squares handout you picked up, in your form write “magic squares handout”

Do Now Review

DO NOW 9/25/13Magic Squares handout

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***

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

Tutoring • Tuesday 2:30-3:30 in room 529

• NO TUTORING THURSDAY – Test retakes and make ups ONLY

Remind 101

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

Valence Electron

s:ELECTRONS AVAILABLE

FOR BONDING

Definition

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

Group 1 (alkali metals) have 1 valence electron

Group 2 (alkaline earth metals) have 2 valence electrons

Group 13 elements have 3 valence electrons

Group 14 elements have 4 valence electrons

Group 15 elements have 5 valence electrons

Group 16 elements have 6 valence electrons

Group 17 (halogens) have 7 valence electrons

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

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

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

Dot NotationsAn atom’s valence electrons can be represented by Lewis dot notations.

1 valence e-

X2 valence e-

X3 valence e-

X4 valence e-

X5 valence e-

X6 valence e-

X7 valence e-

X8 valence e-

X

Dot Notations – Period 2

Lewis dot notations for the valence electrons of the elements of Period 2.

lithium

Liberyllium

Beboron

Bcarbon

C

nitrogen

Noxygen

Ofluorine

Fneon

Ne

Lewis Dot Practice

• Lewis Dot handout

Poll Anywhere

• Of the following elements which would have the largest radius?

A. Lithium (Li) atomic #3B. Nitrogen (N) atomic #7 C. Neon (Ne) atomic #10 D. Boron (B) atomic #5

Poll Anywhere

• As one moves from down ( ↓ ) a group on the periodic table, the electronegativity of the elements encountered tends to:

A. stay the same B. increase C. decrease

Poll Anywhere

• The elements with the smallest atomic radii are found in the:

A. upper right-hand corner of the periodic table B. upper left-hand corner of the periodic table C. lower left-hand corner of the periodic table D. lower right-hand corner of the periodic table

Poll Anywhere

• Cations have a ______________ charge and are ______________ than the atoms from which they formed.

A. negative/smaller B. positive/larger C. positive/smaller D. negative/larger

Poll Anywhere

• A vertical column of elements on the periodic table can also be referred to as

A. Family B. Group C. period D. series

Poll Anywhere

• Generally speaking the group of elements with the highest first ionization energy is

A. Group 17 B. Group 1 C. Group 16 D. Group 18

Poll Anywhere

• Elements with the smallest atomic radii are found in the :

A. Lower left-hand corner of the Periodic table B. Lower right-hand corner of the PT C. Upper left-hand corner of the PT D. Upper right-hand corner of the PT

Poll Anywhere

The energy required to remove an electron from an atom is known as

A. Radioactivity B. Electron Affinity C. Ionization energy D. Electronegativity

Hands up Pair Up!

• Periodic Trends handout

I have, Who has?

• Review!