Question

Write a chemical equation representing the first ionization energy for lithium while using e as a symbol for electron.

Answer 1

It's likely what's wanted is
Li→Li2++2e−

The reason is because IEs are usually reported from the neutral atom, that is, IE2 is the energy required to remove two electrons from a neutral Li atom, as above, rather than the additional energy required to remove one more electron from an Li+ cation.