1. Notes #1: Chemical Bonds
WCHS Chemistry
**NEED YOUR PERIODIC TABLE OUT**

2. SOMETHING VERY SPECIAL FOR THIS UNIT!
NEXT WEEK:
5 days → 4 mini-quizzes
Notes/Quiz/Notes/Quiz etc...

3. CHEMICAL BOND Atoms join together chemically to become stable HOW?
Electrons are transferred or shared to become a NEW chemical
ONLY valence electrons are used in bonding

4. ONLY valence electrons are used in bonding
Reminder: Valence electrons = the e- in the highest energy level 1s
2sp
3spd
4spdf

5. CIRCLE THE VALENCE ELECTRONS...
Group #?
1s22s22p63s23p3 5
P _________________________
Mg _________________________
Ge _________________________
Cu _________________________ 2
1s22s22p63s2
1s22s22p63s23p64s23d104p2 4
1s22s22p63s23p64s23d9
d-block
*The group # tells you the # of valence electrons!*

7. - +
Electrostatic Attraction e- e-

8. OCTET RULE Stable when full!!
Atoms will gain or lose electrons to obtain a full valence shell of 8 e’s. (except 1s)
Stable when full!!

9. CIRCLE THE VALENCE ELECTRONS...
1s22s22p6
Ne0 _________________
Na0 _________________
Ar0 __________________
Cl0 __________________
1s22s22p63s1
1s22s22p63s23p6
1s22s22p63s23p5
All atoms want a noble gas configuration!!

10. Stable Charge +1 +2 +3 +4 -3 -2 -1 Li - 1s22s1 N - 1s22s22p3+2 +3 +4 -3 -2 -1
Li - 1s22s1
N - 1s22s22p3
Be - 1s22s2
O - 1s22s22p4
B - 1s22s22p1
F - 1s22s22p5
C - 1s22s22p2
Ne - 1s22s22p6