ionic bonding

• Describe what an ion is

  an atom or group of atoms that has an electric charge. it has a different amount of electrons than protons
• what is a cation?

  A positively charged ion
• what is an anion?

  A negatively charged ion
• Explain the formation of ions in groups 1

  Group 1 elements produce ions^+ because they have one electron in their outer shell and lose that one electron to have a full outer shell.

  This makes them positively charged as there are more protons than electrons so charges are not balanced.
• Explain the formation of ions in groups 2

  Group 2 elements produce ions^2+ because they have two electrons in their outer shell and lose 2 electrons to have a full outer shell to become positively charged.
• Explain the formation of ions in groups 6

  Group 6 elements produce ions^2- because they gain two electrons to have a full outer shell
• Explain the formation of ions in groups 7

  Group 7 elements produce ions^- because they have 7 electrons in their outer shell and gain an electron to have a full outer shell and become negatively charged because there are more electrons than protons so charges are not balanced
• Explain the use of endings -ide in naming compounds


  -ide if it contains just two elements
• Explain the use of endings -ate in naming compounds


  -ate if it contains three or more elements, one of which is oxygen.
• Describe an ionic bond


  formed between two or more atoms by the transfer of one or more electrons between atoms.
• Explain the structure of an ionic compound

  a giant lattice structure with strong electrostatic forces of attraction. regular arrangement of ions.
• Explain why ionic compounds have high melting and boiling points

  because of the large amounts of energy needed to break the many strong bonds.
• Explain why ionic compounds conduct electricity when in aqueous solution or molten but not when solid

  in molten state or in solution form, the ions are free to move and can conduct electricity.