BONDING OF ATOMS

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BONDING OF ATOMS

• BY Bertram H. Ross
• For ECI 530

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Project Description Bonding of Atoms

• There are several sections in our project.
• First, the nature of chemical bonding, then we
  differentiate between the two main types of
  bondingcovalent and ionic bonding.
• After we compare covalent and ionic bonding, we
  introduce metallic bonding.
• Finally, we discuss alternative ways of
  approaching bonding and the phenomenon of polar
  covalent bonding.
• A Quiz is placed at the end before the citations.

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MENU SLIDE
Bonding How?
Comparison of Bond Types
Covalent bonding 1, 2, 3.
More About Bonding 1,2,3.
Ionic Bonding 1, 2, 3
Quiz
Metallic Bonding
References
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Bonding of Atoms How?

• How do atoms bond to form compounds?
• A) Atoms have valence electrons determined by its
  Group in the Periodic Table.
• B)Valence electrons are redistributed to give an
  inert gas structure.
• C) Valence electrons are either shared or
  transferred.

Answer
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Covalent Bonding 1

• Phases

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Covalent Bonding 2
2 hydrogen atoms share a pair of electrons.
Hydrogen molecule formed.
Hydrogen and chlorine form a bond by sharing a
pair of electrons. Hydrogen chloride molecule
formed.
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Covalent Bonding 3 Hydrogen Molecule Forming

• Two hydrogen atoms share a pair of electrons one
  from each atom.

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Ionic Bonding 1

• Chlorine atom with electron configuration 2,8,
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• Seven valence electrons

• Sodium atom with electron configuration 2, 8, 1
• One valence electron

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Ionic Bonding 2

• Sodium loses its valence electron
• Forms positive ion
• Na

• Chlorine accepts this electron
• Forms negative ion
• Cl-

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Ionic Bonding 3 External Appearances
Sodium metal
Sodium Chloride Salt
Chlorine gas

• Sodium metal reacts with chlorine gas Na Cl-

• Sodium Chloride is formed
• (Table salt) Na . Cl-

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Metallic Bonding

• Atoms of metals form metallic bonds.
• Each atom of the metals gives up its valence
  electrons forming a cation.
• A SEA OF ELECTRONS are delocalized about the
  whole structure.

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Comparison of Bond Types

• Electrons shared
• Covalent Bond formed
• Molecule
• Non-conductor of electricity

• Electron transferred
• Positive and negative ions formed
• Ionic Compound
• Conducts electricity

• Covalent Bonding

• Ionic Bonding

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More about Bonding 1

• Bonds shown by electron dot structures. (NF3)

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More about Bonding 2
Covalent polar bonds exist
2 H? O?- Polarity
due to size and nuclear charge disparities.

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More about Bonding 3
Above the hydrogen fluoride molecule is shown. A
partial positive charge and a partial negative
charge results because of the size and charge
differences.
Polar Covalent Bond
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Quiz

• Chemical Bonding Quiz.doc

• Chemical Bonding Quiz.doc

• Quiz

• Answers

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References

• www.gcsescience.com/a29-covalent-bond-hydroge...
• mortada8.maktoobblog.com/.../
• www.ehow.com/how-does_4568765_electron-dot-diagram
  -work.html
• www.gcsescience.com/a5-reaction-sodium-chlorine.ht
  m
• www.tutorvista.com/...bonding/ionic-bonding-anim
  ation.php
• www.youtube.com/watch?v1wpDicW_MQQ

End