Question

if an element has more than one ionic change how is that piece of information represented in the chemical name

Answer 1

If you are talking about elements that can have more than one oxidation state, put the charge that they have in roman numerals behind the name.
ex) Fe³⁺ is written Iron (III) and Fe²⁺ is written Iron (II)

I hope this helps. Let me know in the comments if anything is unclear.