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Chemical Bonding

Chemical Bonding. What we know so far…. Dot and Cross diagrams. Bonding. Ionic Bonding Often between Metal’s and non-metals Always involves two oppositely charged particles NaCl , ZnO , NH 4 Cl. Ionic bonding. Drawing Dot and Cross Diagrams, tips,

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Chemical Bonding

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  1. Chemical Bonding

  2. What we know so far… • Dot and Cross diagrams

  3. Bonding • Ionic Bonding • Often between Metal’s and non-metals • Always involves two oppositely charged particles • NaCl, ZnO, NH4Cl

  4. Ionic bonding • Drawing Dot and Cross Diagrams, tips, • Drawing arrows doesn’t show ionic bonding! • Always use square brackets • Try using an ionic equation

  5. Common Ions • Group 1 • 1+ • Group 2 • 2+ • Group 3 • 3+ • Group 5 - 7

  6. Common Molecular Ions • Ammonium • Hydroxide • Nitrate • Carbonate • Sulfate • Dichromate • Phosphate

  7. Working out Ionic formula • Rules • Overall Charge is 0 • Work out the number of +ve and –ve ions required to balance the charges • Quick check • Question 1 a & d • Question 2 a, c & e • Question 3 a, d & f

  8. Covalent Bonding • Definition… • The sharing of one pair of electrons between two atoms. • The bond is caused by the electrostatic attraction of the positive nuclei attracting to the negative electrons between the atoms

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