4.1+Ionic+bonding

Learning Goals: (2 hours)
 * Describe the ionic bond as the electrostatic attraction between oppositely charged ions.
 * Describe how ions can be formed as a result of electron transfer.
 * Deduce which ions will be formed when elements in groups 1, 2 and 3 lose electrons.
 * Deduce which ions will be formed when elements in groups 5, 6 and 7 gain electrons.
 * State that transition elements can form more than one ion.
 * Predict whether a compound of two elements would be ionic from the position of the elements in the periodic table or from their electronegativity values.
 * State the formula of common polyatomic ions formed by nonmetals in periods 2 and 3.
 * Describe the lattice structure of ionic compounds.