Here's how to figure that out:

* Lithium: Lithium is a Group 1 element, meaning it has a +1 charge (Li⁺).

* Carbonate: The carbonate ion is CO₃²⁻, with a -2 charge.

* Balancing charges: To balance the charges, you need two lithium ions (2 x +1 = +2) to match the -2 charge of the carbonate ion.