The element $X$ makes $X^-$ ions, and acidified potassium manganate(VII) can oxidise these ions back to element $X$. What might the values of the first four ionisation energies of $X$ be?
- A1st $418$, 2nd $3070$, 3rd $4600$, 4th $5860$
- B1st $577$, 2nd $1820$, 3rd $2740$, 4th $11600$
- C1st $590$, 2nd $1150$, 3rd $4940$, 4th $6480$
- D1st $1010$, 2nd $1840$, 3rd $2040$, 4th $4030$