Question

Systematic name for Fe2O3 (s)

Answer 1

Cul (s) --> represents its state which means solid, Here Valency of copper is 1 so its cuprous. 

Fe2O3--> Ferric Oxide is a solid. Here valency of Fe is +3 so its Ferric 

CoF2--> Cobalt Flouride is a solid

FeO --> Ferrous Oxide is a solid. Here valency of iron is +2 so its Ferrous. 

Answer 2

Answer : The name of $Fe_2O_3$ is, Iron(III) oxide.

Explanation :

$Fe_2O_3$ is an ionic compound because iron element is a metal and oxygen element is a non-metal. The bond formed between a metal and a non-metal is always ionic in nature.

The nomenclature of ionic compounds is given by:

1. Positive ion is written first.

2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.

3. In case of transition metals, the oxidation state are written in roman numerals in bracket in-front of positive ions.

The charge on iron is (+3) and the the charge on oxygen is (-2). That means the oxidation state of iron is (+3).

Hence, the name of $Fe_2O_3$ is, Iron(III) oxide.