The following are the first ten ionization energies of an element in the third period. What is the identity of that element?
1st IE: 1250, 2nd IE: 2320, 3rd IE: 3280, 4th IE: 5110, 5th IE: 6560, 6th IE: 9360, 7th IE: 9360, 8th IE: 33600, 9th IE: 38600, 10th IE: 44000
(a) Ar
(b) Br
(c) Cl
(d) Fe
(e) Mn