Covalent Bonds

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Covalent Bonds

• Chapter 5 Section 3

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Covalent Bonds

• The chemical bond when two atoms SHARE electrons.
• Usually form between atoms of NONMETALS or
  between a NONMETAL HYDROGEN.
• By sharing electrons, each atom has a stable
  outer shell.

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• By sharing electrons in a covalent bond, each
  Fluorine atom has a stable set of eight valence
  electrons.

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• The nitrogen atom in ammonia has eight valence
  electrons as a result of forming covalent bonds
  with hydrogen atoms.

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Lets Play Gotcha!
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Double Bonds
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Triple Bonds!
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Physical Characteristics of Covalent Compounds

• A.K.A Molecular Compounds
• Lower Melting and Boiling points
• Do not conduct electrical current when melted or
  dissolved in water.
• Why do you think that Molecular Compound do not
  conduct a current?

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Unequal Sharing of Electrons

• Occurs when an atom of an element pulls more
  strongly on shared electrons.
• Causes the bonded atoms to have slight electrical
  charges.
• Atom that is pulling electrons stronger has a
  slight ___________ charge.
• Atom with the weaker pull has a slight
  ____________ charge.
• Unequal bonding is called Polar bond
• Equal bonding is called Nonpolar bond.

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