Question

What is the name of \[FeN\]?

Answer 1

Hint :Oxidation number: It is the charge given to an atom on the basis of the number of electrons gained or released while forming a chemical bond. If a transition metal is used in the formula then its oxidation number must be mentioned against the name of the metal. The given compound is an ionic compound so it should be named according to the rules of naming an ionic compound.

Complete Step By Step Answer:
Rules to name an ionic compound are as follows:
The name of cation i.e., positively charged species should be written before that of the name of anion i.e., negatively charged species.
The suffix ‘-ide’ should be added while naming an anion.
A proper prefix like mono, di, tri, etc. should be added if more than one atom of anion is present.
The word ion is not included in the name unless the compound does not have any charge on it.
Let the oxidation number of Iron be \[x\]. As formal charge on nitrogen atom is \[ - 3\] and overall charge on the compound is zero, so the equation can be written as:
\[\begin{array}{l}x - 3 = 0\\x = + 3\end{array}\]
Hence the oxidation state of Iron is \[ + 3\].
Nitrogen is an element of the group \[15\] and because it is an anion, we need to add a suffix according to the given rules. So, the name of anion becomes ‘Nitride’.
 Hence the name of the given compound \[FeN\] is Iron \[(III)\] Nitride.

Note :
Formal charge: It is a charge given to an atom assuming there is equal sharing of electrons and factors like electronegativity of an atom does not affect the bonding of the compound. Formal charge is majorly used in the calculation of the unknown oxidation states of the metals participating in the bonding.