Ionic bonding

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Ionic bonding
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Ionic bonding

• Ion An atom or group of atoms that has become
  electrically charged.

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Ionic bonding

• Ion An atom or group of atoms that has become
  electrically charged.
• Question But an atom is neutral (no charge)
  because it has the same number of positive
  protons as it has negative electrons. So what
  happens to make it have an electrical charge?

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Ionic bonding

• Ion An atom or group of atoms that has become
  electrically charged.
• Question But an atom is neutral (no charge)
  because it has the same number of positive
  protons as it has negative electrons. So what
  happens to make it have an electrical charge?
• Answer It gains or loses electrons.

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Ionic bonding

• Ion An atom or group of atoms that has become
  electrically charged by gaining or losing
  electrons.

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Ionic bonding

• Ion An atom or group of atoms that has become
  electrically charged by gaining or losing
  electrons.
• An atom that loses an electron will become a
  __________ ion.

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Ionic bonding

• Ion An atom or group of atoms that has become
  electrically charged by gaining or losing
  electrons.
• An atom that loses an electron will become a
  _positive___ ion.

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Ionic bonding

• Ion An atom or group of atoms that has become
  electrically charged by gaining or losing
  electrons.
• An atom that loses an electron will become a
  _positive___ ion.
• An atom that gains an electron will become a
  __________ ion.

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Ionic bonding

• Ion An atom or group of atoms that has become
  electrically charged by gaining or losing
  electrons.
• An atom that loses an electron will become a
  _positive___ ion.
• An atom that gains an electron will become a
  _negative__ ion.

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Ionic bonding

• An atom that loses an electron will become a
  _positive___ ion.
• An atom that gains an electron will become a
  _negative__ ion.
• Question What happens when positive meets
  negative?

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Ionic bonding

• An atom that loses an electron will become a
  _positive___ ion.
• An atom that gains an electron will become a
  _negative__ ion.
• Question What happens when positive meets
  negative? Attraction!

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Ionic bonding

• An atom that loses an electron will become a
  _positive___ ion.
• An atom that gains an electron will become a
  _negative__ ion.
• Question What happens when positive meets
  negative? Attraction!
• Ionic bond The attraction between two oppositely
  charged ions.

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Ionic bonding

• Ionic bond The attraction between two oppositely
  charged ions.

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Ionic bonding

• Ionic bond The attraction between two oppositely
  charged ions.
• Ionic compound Molecules formed through ionic
  bonding.

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Polyatomic ions

• Polyatomic ions Ions made of a compound (more
  than one atom acting as one).

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Polyatomic ions

• Polyatomic ions Ions made of a compound (more
  than one atom acting as one) (poly means many).

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Polyatomic ions

• Polyatomic ions Ions made of a compound (more
  than one atom acting as one) (poly means many).
• Examples NH4 SO4

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Crystal

• Crystal An orderly 3-dimensional arrangement of
  atoms.

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Properties of ionic compounds

• Crystal shape
• Flat surfaces
• Sharp edges
• Corners

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Properties of ionic compounds

• Crystal shape
• Flat surfaces
• Sharp edges
• Corners

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Properties of ionic compounds

• Crystal shape
• Flat surfaces
• Sharp edges
• Corners
• High melting points

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Properties of ionic compounds

• High melting points
• Lots of energy is
• needed to break the
• charged particles apart
• Thus ionic compounds
• are always solid at room
• temperature

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Properties of ionic compounds

• High melting points
• Lots of energy is needed
• to break the charged
• particles apart
• Thus ionic compounds
• are always solid at room
• temperature
• Electrical conductivity when dissolved in water
  (but not as solids).

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Ions, charges, bonds
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