Question

How would you name the compound $Mn{F_3}$

Answer 1

$Mn{F_3}$ is an ionic compound where manganese is a cation with +3 oxidation state and fluorine is an anion with -1 oxidation state. For naming the compound, cation is written first followed by its charge in roman number than the anion.

Complete step by step answer:
The compound $Mn{F_3}$ is an ionic compound. The ionic compound is formed by the transfer of electrons between the atoms. The atoms lose or gain electrons to form ions. When the atom gains electrons, then a negative charge species is formed known as anion. When the atom loses electrons, then a positive charge species is formed known as cation.
The manganese is a transition metal element which can have a number of oxidation states. In $Mn{F_3}$, the oxidation state of manganese is +3 as three fluorine atoms are present where each fluorine ion has -1 charge. In this compound the cation is manganese and the anion is the fluoride ion. $Mn{F_3}$is a binary ion as it is formed from two different atoms.
For naming of the ionic compound, the cation is written first followed by the anion. The name of the cation is written the same as its chemical element name. The anion is named with the help of the elemental name by removing the ending and adding the “-ide” in the suffix. The cations with the multiple charge, the charge is written in the roman number just next to the element's name.
For $Mn{F_3}$, as the manganese has +3 oxidation state, the chemical name of the compound is given as manganese(III)fluoride.

Note:
The manganese (III) Fluoride is formed by reacting the solution of manganese (II) fluoride in hydrogen fluoride with fluorine.
The reaction is shown below.
$Mn{F_2} + 0.5{F_2} \to Mn{F_3}$