* Copper(I) Carbonate Formula: Copper(I) carbonate has the formula Cu₂CO₃. The Roman numeral "I" indicates that copper has a +1 oxidation state in this compound.

* Copper(II) Carbonate Formula: The correct formula for copper(II) carbonate is CuCO₃. The Roman numeral "II" indicates that copper has a +2 oxidation state.

So, the correct name for Cu₂CO₃ is Copper(I) Carbonate.

The confusion might arise because copper can exist in two common oxidation states: +1 and +2.

Here's a summary:

* Cu₂CO₃ - Copper(I) Carbonate (Copper has a +1 oxidation state)

* CuCO₃ - Copper(II) Carbonate (Copper has a +2 oxidation state)