Ch.%206%20Bonding - PowerPoint PPT Presentation

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Ch.%206%20Bonding

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Nonpolar Covalent. when electrons are shared evenly. Ionic vs. ... nonpolar covalent. Patterns. What kind of patterns do you see? metals nonmetals = ionic ... – PowerPoint PPT presentation

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Title: Ch.%206%20Bonding


1
Ch. 6 Bonding
  • 6.1 Introduction to Chemical Bonding

2
Chemical Bonds
  • atoms rarely exist alone
  • when atoms are bonded together, they have less
    potential energy and are more stable
  • What is potential energy?
  • chemical bond mutual electrical attraction
    between the nuclei and valence electrons of
    different atoms that binds the atoms together

3
Ionic Bonds
  • results from electrical attraction between large
    numbers of cations and anions
  • atoms donate or accept electrons from each other

4
Covalent Bonds
  • results from sharing of electron pairs between
    two atoms
  • the electrons shared belong to both atoms

5
Covalent Bonds
  • Polar Covalent
  • when electrons are shared unevenly
  • Nonpolar Covalent
  • when electrons are shared evenly

6
Ionic vs. Covalent
7
Ionic vs. Covalent
  • bonding usually does not fall in one category or
    the other, but somewhere in between
  • type of bond depends on the elements differences
    in electronegativities

8
Ionic vs. Covalent
Difference in electronegativities Percent Ionic Character
Ionic gt 1.7 gt 50
Polar Covalent 0.3 1.7 5 50
Nonpolar Covalent 0 0.3 0 5
9
Polarity
  • Polar- uneven distribution of charge
  • Show partial charges on structure by using ?
    (lowercase delta)

10
  • Determine whether each of the following bonds
    will be
  • ionic, polar covalent, OR nonpolar covalent

11
  • S and H
  • 2.5-2.10.4
  • polar covalent
  • S and Cs
  • 2.5-0.71.8
  • ionic
  • C and Cl
  • 3.0-2.50.5
  • polar covalent

12
  • Cl and Ca
  • 3.0-1.02.0
  • ionic
  • Cl and O
  • 3.5-3.00.5
  • polar covalent
  • Cl and Br
  • 3.0-2.8
  • nonpolar covalent

13
Patterns
  • What kind of patterns do you see?
  • metals nonmetals ionic
  • nonmetals nonmetals covalent
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