I am given a data table that explains the successive ionisation energy of some elements. They are unknown but their values by which i found out what the elements are. NOw, one question is such that: How much energy is required to accompany the following changes. a) B^2+ (g) = B^4+ (g)?

Here, shall i do it by using the values of the table? because energy here is referring to the successive ionisation energies. NO?

Don't know. Help.Thanks.