1.21 ionic bonds

• Ionic compounds have high melting points because the strong electrostatic forces between oppositely charged ions hold them tightly together, requiring lots of energy to break these bonds.
• What is an ion

  An atom or group of atoms with positive or negative charge
• Ending is -ate mean compound contains at least 3 elements one which is oxygen
• Ending in -ide mean compound contains 2 elements
• Ionic compounds

  • Consisting of regular arrangement of ions()
  • Ions held together by strong electrostatic forces(ionic bonds) between oppoitely charged ions
• Ions are charged atoms or molecules
• Group 1 and 2 metals form ionic compounds with group 6 and 7 non-metaos because there ions have opposite charges
• Ionic compounds: Mg2+ + Br- -> MgBr2
• How are ionic bonds formed

  by transfer of electrons to produce cations and anion
• Why does group 1 and 2 join with group 6 and 7 to make ionic compound?

  There ions have opposite chargesp
• Group 1 metals lose their 1 outer electron to from 1 positive ions

  Group 2 lose 2 outer electrons to form positive ions

  Group 7 non-metals gain 1 outer electron to form 1 negative ions

  Group 6 non-metal gain 2 outer electrons to from 2 negative ions
• In metal atoms lose electrons to form positive charged ions

  In non metal atoms gain electrons to form negative charged ions
• What are electrostatic forces?

  Attractive (and repulsive ) forces between charged particles results In ionic
• How is ionic lattice formed?

  Lattice is formed because the ions attract each other and form regular pattern with oppositely charged ions next to each other
• What is ionic lattice

  A regular arrangement of ions
• When ions solid it doesn't conduct because it has no free ions

  When ions is liquid itdoes conduct because it has free ions which move and carry charge