Identify the chemical equation for the reaction of Mg(s) with O₂(g). Write N.R if it is predicted that no reaction will occur.

Consider the following oxide models. The grey spheres represent O, and the blue spheres represent elements in their highest oxidation state from the second and third periods of the periodic table. Identify each as either an ionic oxide or covalent oxide.

The following models represent the structures of oxides of 2nd and 3rd-period elements in their highest possible oxidation states. Provide the atom that is not oxygen in each case, and identify the molecular formula for each. Assume that there are no formal charges on any atom and the bonds shown can be double or triple bonds.

Arrange the oxides in increasing order from least covalent to most covalent:

SO₂, As₂O₅, CaO, Ga₂O₃, Rb₂O