Final answer:
The form of hydrogenated nitrogen that should exist is ammonia (NH3), and when two nitrogen atoms combine to make nitrogen gas, six electrons are shared in a triple bond.
Step-by-step explanation:
To determine the form of hydrogenated nitrogen that should exist, we need to look at the valency of nitrogen and hydrogen atoms. Nitrogen, with 7 protons, has 5 electrons in its valence shell, as it is in group 15 of the periodic table. Hydrogen has 1 electron in its valence shell and needs one more to become stable. When nitrogen and hydrogen react, they form ammonia (NH3), where nitrogen shares three of its valence electrons with three hydrogen atoms, each contributing one electron, thus forming three single covalent bonds.
The correct answer to what form of hydrogenated nitrogen should exist is c) NH3, which is ammonia. When combining two nitrogen atoms to make nitrogen gas (N2), a total of six electrons are shared, forming a triple bond between the nitrogen atoms.