Help please, Rank these elements according to first ionization energy.
Highest to lowest:
I have: Ne,F,O,N,C,B,Be,Li and it says I'm wrong (there are two exceptions within this general trend. The atom with the ns2 electron configuration is particularly stable and should move up one spot in the ranking. Similarly, the atom with the ns2np3 electron configuration is particularly stable and should move up one spot in the ranking.) any help?

Question

Help please, Rank these elements according to first ionization energy.
Highest to lowest:
I have: Ne,F,O,N,C,B,Be,Li and it says I'm wrong (there are two exceptions within this general trend. The atom with the ns2 electron configuration is particularly stable and should move up one spot in the ranking. Similarly, the atom with the ns2np3 electron configuration is particularly stable and should move up one spot in the ranking.) any help?

somy · Answer

ionization energy depends on 
how many shells are there? 
how many electrons does last shell contain?

somy · Answer

the more shells there are 
the lower the ionization energy 
which is why as u go down a group- ionization energy decreases

anonymous · Answer

I have tried Li<B<Be<C<N<O<F<Ne  and it says I'm wrong but on the right track?