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Polar bond

Bob Jones PPT Notes -- Chapter 7b

Subject: 
Chemistry
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Chemistry
Chemical bonding
Chemical polarity
Chemical bond
Covalent bond
VSEPR theory
Polar bond
Hydrogen bond
Electronegativity
molecular geometry
Ionic bond
Sigma bond
Technology

Molecular Geometry 1 Valence Shell Electron Pair Repulsion (VSEPR) Theory Electron concentrations are arranged so as to be at maximum distance. Why? Electrons repel each other. Number of Electron Concentrations H H H H C ? ? ? ? Ex: CH4 O F F C ? ? ? ? Ex: CF2O Number of Electron Concentrations all 4 bonded = tetrahedral Ex: CH4 H H H H C ? ? ? ? 4 Regions of e? Conc. 5 Chemistry textbook, p. 169 3 bonded = pyramidal Ex: NH3 H H H N ? ? ? 4 Regions of e? Conc. 6 Chemistry textbook, p. 167 2 bonded = bent 104.5? Ex: H2O H H O ? ? 4 Regions of e? Conc. 7 Chemistry textbook, p. 170 1 bonded = linear Ex: HF H F ? 4 Regions of e? Conc. 8 Chemistry textbook, p. 170 All 3 bonded = trigonal planar 2 bonded = bent 120? Ex: BI3 Ex: GeF2 1 bonded = linear Ex: SO 3 Regions of e? Conc.

Bob Jones PPT Notes -- Chapter 6a

Subject: 
Chemistry
Rating: 
0
No votes yet
Tags: 
Chemistry
Chemical bonding
Chemical bond
Chemical polarity
Ionic bond
Covalent bond
polarity
Polar bond
Octet rule
molecule
Fluorine
Sigma bond
Technology

Basics of Bonding 1 The second law of thermodynamics tells us that things tend to lose energy. Balls roll downhill. Electrons return to ground state. Atoms link or bond to each other. 2 Atoms bond because they Lose energy Gain stability 3 Energy/stability Unbonded Bonded 4 BJU Press Chemistry textbook p. 140 Noble gases (8 outer e?) are the most stable elements. Elements gain, lose, or share electrons to attain the ?noble-gas electron configuration.? This is called the octet rule. 5 Ionic: Metals/nonmetals Covalent: Nonmetals/nonmetals Metallic: Metals/metals Types of Bonds A property affecting ionic and covalent bonds The tendency of objects to have regions of opposite charge Polarity Examples: N and S poles (+) and (?) ends of a battery polar bond
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