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Which gases react to form ammonia in the Haber-Bosch process?

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Difference in molecular structure between ammonia/amines and quaternary ammonium ions — ammonia Ammonia and amines have a slightly flattened trigonal pyramidal shape with a lone pair of electrons above the nitrogen. In quaternary ammonium ions, this area is occupied by a fourth substituent.

The Haber-Bosch process synthesizes ammonia through the direct reaction of elemental nitrogen and elemental hydrogen gases.12

The chemical equation for this reaction is:
$N_{2} + 3 H_{2} \to 2 N H_{3}$

To make this process economically feasible, the reaction is conducted under high pressure (typically 100–1,000 atmospheres) and at elevated temperatures (400–650 °C), utilizing a catalyst—most commonly iron—to facilitate the formation of ammonia.12