describe, in simple terms, the lattice structure of a crystalline solid which is: (a) giant ionic, including sodium chloride and magnesium oxide (b) simple molecular, including iodine, buckminsterfullerene \( C_{60} \) and ice (c) giant molecular, including silicon(IV) oxide, graphite and diamond (d) giant metallic, including copper

describe the electronic configurations to include the number of electrons in each shell, sub-shell and orbital

explain the variation in melting point and electrical conductivity in terms of the structure and bonding of the elements