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polarity

Bob Jones PPT Notes -- Chapter 6a

Subject: 
Chemistry
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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

Inter/IntraMolecular Forces

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Chemistry
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Chemistry
Chemical bonding
Intermolecular forces
Supramolecular chemistry
Chemical properties
Noncovalent bonding
Intramolecular force
Chemical bond
Hydrogen bond
Chemical polarity
Hydrogen chloride
Dipole
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intermolecular forces
boiling points
melting points
polarity
3 Types of bonds: [IONIC, COVALENT, METALLIC] ---> Intramolecular forces INTERmolecular Forces: Force of attraction between molecules Ionic > [Hydrogen Bonding > Dipole-Dipole > LDF] <---Covalent A. Dipole-Dipole 1. Definition - Positive (Polarity) seeks negative 2. Happens between POLAR molecules EX: HCl attracts HCl H-Cl --><-- H-Cl B. Hydrogen Bonding 1. Definition - Attraction between Hydrogen atoms and unshared electrons of Hydrogen (H), Oxygen (O), or Florine (F). 2. STRONG attraction <---IMPORTANT 3. Holds DNA strands together EX: H2O attracts H2O (Dipole-Dipole is there too) HAVE POLARITY C. London Dispersion Forces (LDF)
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