If you drew a graph for second ionization energy, which element woul you have to omit? Why?

1 Answer
Nov 2, 2016

Well, of course you would have to exclude the hydrogen atom. Why?


First ionization, both the atom and the cation are specified to be in the gas phase:

#H(g) +Delta rarr H^(+)(g) + e^-#

But the hydrogen cation ain't got no more electrons; and thus it cannot have a second ionization event.