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A. Why study chemistry?
1. Chemistry2. Matter
CHEMISTRYI.
IntroductionB. Definitions
3. Elements
4. Molecule
5. Compound
Figure 2.3
Figure 5.3
A. Particles / Structure
II. Atomic Chemistry
Figure 2.5
B. Atomic & Mass Number
C. Isotopes & Radioisotopes
Figure 2.7
Isotopes = more neutrons but stable
Radioisotopes = nucleus decay giving off alpha and beta particles, plus gamma rays.
Decay = half life
Why would this activity be so bad for cells?
E. Electrons
Figure 2.8
Figure 2.9
Figure 2.6
Figure 2.10
Atom No. Electrons Sub shell Electron Configuration Ion No. Electrons Sub shell Electron Configuration
H 1 1s1 H- 1 + 1 = 2 1s2
He 2 1s2
Li 3 1s2 2s1 Li+ 3 - 1 = 2 1s2
Be 4 1s2 2s2 Be2+ 4 - 2 = 2 1s2
B 5 1s2 2s2 2p1 B3+ 5 - 3 = 2 1s2
C 6 1s2 2s2 2p2 C4+ 6 - 4 = 2 1s2
N 7 1s2 2s2 2p3 N3- 7 + 3 = 10 1s2 2s2 2p6
O 8 1s2 2s2 2p4 O2- 8 + 2 = 10 1s2 2s2 2p6
F 9 1s2 2s2 2p5 F- 9 + 1 = 10 1s2 2s2 2p6
Ne 10 1s2 2s2 2p6
Na 11 1s2 2s2 2p6 3s1 Na+ 11 - 1 = 10 1s2 2s2 2p6
Mg 12 1s2 2s2 2p6 3s2 Mg2+ 12 - 2 = 10 1s2 2s2 2p6
Al 13 1s2 2s2 2p6 3s2 3p1 Al3+ 13 - 3 = 10 1s2 2s2 2p6
Si 14 1s2 2s2 2p6 3s2 3p2 Si4+ 14 - 4 = 10 1s2 2s2 2p6
P 15 1s2 2s2 2p6 3s2 3p3 P3- 15 + 3 = 18 1s2 2s2 2p6 3s2 3p6
S 16 1s2 2s2 2p6 3s2 3p4 S2- 16 + 2 = 18 1s2 2s2 2p6 3s2 3p6
Cl 17 1s2 2s2 2p6 3s2 3p5 Cl- 17 + 1 = 18 1s2 2s2 2p6 3s2 3p6
Ar 18 1s2 2s2 2p6 3s2 3p6
www.Ausetute.com.a
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Valence => number of electrons in the outermost shell
Figure 2.9
Electronegativity degree of attraction for electrons
Figure 2.9
A. Definition
1. Definition2. Types
III. Molecular Chemistry
B. Chemical Bonds
a. Electron Sharing
i. Covalent bonds = sharing of valence electrons
Figure 2.11
Non-polar covalent bonds
Figure 2.12
Polar
Figure 2.13
Figure 2.15
Figure 2.14
ii. Ionic = giving and receiving electrons
b. Hydrogen Sharing
Hydrogen bonds sharing a hydrogen
Figure 2.16
Hydrogen bonds sharing a hydrogen
Figure 3.2
c. VanderWalls Forces
VanderWalls Forces sharing a charge
1. Why Important?C. Formulas & Models
Figure 2.17
Figure 2.18
c. Structural
b. Empirical
a. Molecular
A. Definition
1. Synthesis, Dehydration, or Anabolic2. Decomposition, Hydrolytic, or Catabolic
IV. Chemical Reactions
B. Types
3. Exchange
A(OH) + B(H) AB + H2O
AB + H2O A(OH) + B(H)
AB + CD AC + BD
C. Factors Affecting Rates
A. Water1. Properties
V. Inorganic Molecules
States of Water
Polar
H-Bonding Potential
Figure 3.2
Density
Figure 3.6
Cohesive Forces
Figure 3.4
Cohesive ForcesFigure
3.3
2. Uses
Solvent
Figure 3.6Figure 3.8
Temperature Stabilizer or Regulator
C. Acids, Bases, pH, & Buffers1. Definitions &
Uses
An acid increases the hydrogen ion concentration
H2CO3 HCO3- + H+
(Carbonic)
H2SO4 H+ + H+ + SO4 2-
(Sulfuric)
HCl H+ + Cl- (Hydrochloric)
A base decreases the hydrogen ion concentration
HCl + NaOH NaCl + H2O (Sodium Hydroxide)
pH Scale measures the hydrogen ion concentration
Figure 3.10
A buffer regulates the pH of a solution
HCO3- + H+ H2CO3
HPO4-2 + H+ H2PO4
-
NH3 + H+ NH4+
How does acid precipitation affect vegetation?
Knowledge will always forbear over stupidity.