Nitrogen and sulfur: compare question

Compare the chemical reactivity of dinitrogen, $\ce{N2}$, with that of ammonia, $\ce{NH3}$. In your answer, include:

• an explanation of the lack of reactivity of dinitrogen with reference to its bonding;
• an explanation of the basicity of ammonia using the Brønsted–Lowry theory;
• the formation of the ammonium ion from ammonia and an acid, and how ammonia can be displaced from an ammonium salt.