Electron capture and ion loss cross-section measurements are reported for the reactants N++O2, N2++O2, N2++H2, N++H2, and O++N2. Ion loss cross-section measurements are presented for the reactants N2+He. Measurements of cross sections for collisional dissociation of the incident molecular ion are reported for the reactants N2++O2 and N2++H2. The measurements span the projectile energy range from 2.4 keV to 24.3 keV. Good agreement is found with the results of other investigators for those energies and reactions for which comparisions are possible.