Question

The chemical formula of the compound containing nitrogen and hydrogen is:
A. $N{H_2}$
B. $N{H_3}$
C. $N{H_4}$
D. ${N_2}{H_6}$

Answer 1

Hint: When the atoms react they react in the form of ions and this reacts to form a molecule. All the chemical reactions that happen, happen to achieve stability. When the atoms react to form molecules he tends to lower their energy and thus become more stable than before. Unless the final product is more stable than the initial reactants, the reaction hardly takes place .This principle explains why only a few combinations of compounds exist, while some are difficult to form.

Complete step by step answer:
All the elements have a different number of electrons and protons and thus possess different properties based on this factor. Some of the elements possess inert nature and are known to have stable behavior. They have an electronic configuration which has a full shell of electron and thus don’t react easily under normal conditions
All the other elements also tend to achieve this state if the full electron shell and thus resort to losing or gaining electrons to achieve this state.
Nitrogen exists in the ionic form ${N^{3 - }}$ by gaining 3 electrons to become stable by achieving a full electronic shell.
Hydrogen exists in the form of ${H^ + }$ by losing 1 electron to achieve a stable state.
When the nitrogen and hydrogen ions interact they react as,

${N_2} + 3{H_2} \to 2N{H_3}$

When the ions interact their valencies exchange and thus they form a molecule. Since the molecule needs to be neutral in charge 3 hydrogen ions combine with I nitrogen ion to balance the charge and form an ammonia molecule.

So, the correct answer is Option B.

Note: The first shell contains a maximum of 2 electrons and the second shell contains 8 electrons and the third shell contains 8 electrons. The maximum number of electrons that can be available to the full shell is $2{n^2}$ , where n is the principal quantum number. The shells are named K, L, M, N, and so on. With principle quantum numbers 1,2,3,4 respectively.