(ionic bonding)

• which number on an element is the atomic mass?

  top number
• which number on an element is the atomic number?

  bottom number
• what is the number of protons/electrons in an atom?

  atomic number
• what is the number of neutrons in an element?

  atomic mass - atomic number
• when do ionic compounds conduct electricity?

  dissolved in a solution or molten
• why can't ionic compounds conduct electricty when solid?

  ions are in fixed positions and can't move.
• why do ionic compounds have high melting/boiling points?

  strong electrostatic attractions and their giant lattice structures.
• what are ionic compounds made up?

  positively and negatively charged ions
• when do anions form?

  when atoms gain electrons, more electrons than protons
• when do cations form?

  when atoms lose electrons, more protons than electrons
• the number of electrons lost/gained is the same as what?

  the charge on the ion
• what is an ionic bonding?

  metal and a non metal react, the metal atom loses electrons to form a cation, the non metal gains these electrons to form an anion.
• what are the forces like in an ionic bond?

  oppositely charged ions are strongly attracted to each other by electrostatic forces
• what are the advantages of a molecular formula, showing an ionic compound?

  what element is it made from
• what are the disadvantages of a molecular formula, showing an ionic compound?

  doesn't show the bonds, how the bonds are formed, the sizes of the atom or its 3D structure.
• what are the advantages of a structual formula, showing an ionic compound?

  shows what element it's made from, and the bonds.
• what are the didadvantages of a structural formula, showing an ionic compound?

  doesnt show how the bonds are formed, the different sizes of atoms or its 3D structure.
• what are the advantages of a full dot and cross diagram, showing an ionic compound?

  what element its made from, the bonds and how theyre formed, and the sizes of the atoms.
• what are the disadvantages of a full dot and cross diagrams, showing an ionic compound?

  doesn't show the 3D structure?
• what are the advantages of a 3D space filling model, showing an ionic compound?

  shows the bonds and the 3D structure.
• what are the disadvantages of a 3D space filling diagram, showing an ionic compound?

  doesn't show how the bonds are formed or the elements its made from.
• what are the advantages of a ball and stick diagram, showing an ionic compound?

  shows the bonds, the sizes of the atoms, and the 3D structure.
• what are the disadvantages of a ball and stick diagram, showing an ionic compound?


  doesn't show what element its made from or how the bonds have been formed.
• what are the advantages of a dot and cross (o), showing an ionic compound?

  it shows what elements its made from, the bonds, and how they are formed.
• what are the disadvantages of a dot and cross (o), showing an ionic compound?

  it doesn't show the sizes of atoms or the 3D structure.