The first five successive ionization energies of a neutral element X are shown below.
1st IE: 738 kJ·mol⁻¹
2nd IE: 1 451 kJ·mol⁻¹
3rd IE: 7 733 kJ·mol⁻¹
4th IE: 10 540 kJ·mol⁻¹
5th IE: 13 630 kJ·mol⁻¹
Which of the following is the most likely group for X in the periodic table?
a) Group 13
b) Group 1
c) Group 2
d) Group 17