Covalent Bonds

1
Covalent Bonds

• Chapter 18 Section 4

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Covalent Bonds

• Remembercovalent bonds form between two
  nonmetals
• The bonds form when electrons are shared between
  atoms, not transferred
• This happens because neither atom will take the
  electrons from the other, they attract them at
  the same time.

3
Single Bonds

• Ionic compounds only form single bonds when there
  are a pair of electrons between atoms
• This molecule has 5 single bonds

4
Single and Double/Triple Bonds

• Covalent (molecular) compounds can form single,
  double, and triple bonds
• Each bond has a pair of electrons between atoms

5
Single and Double/Triple Bonds
6
Covalent Bonds

• The electrons are sometimes shared equally when
  the same element bonds with itself (BrINClHOF).
  This is called a nonpolar bond.
• Sometimes they are shared unequally when one atom
  is slightly stronger than the other. This is
  called a polar bond.

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Covalent Bonds
8
Properties of Molecular Compounds

• Some form crystal shapes, most do not
• Low melting points compared to ionic compounds
• Do not conduct electricity in solution (dissolved
  in water)