Which element in the second period could have the following ionization energies (all in kJ/mol)? ie1 = 800, ie2 = 2430, ie3 = 3700, ie4 = 25000, ie5 = 33000.

a) F (Fluorine)
b) C (Carbon)
c) O (Oxygen)
d) B (Boron)
e) N (Nitrogen)