Why is third ionization energy of phosphorus greater than third ionization energy of aluminiu

Q. Which element has a third ionization energy which is significantly greater than its first or second ionization energies?

Q. The third ionization energy is maximum for :

Q. Why are the ionization energies of 5d elements greater than 3d elements ?

Q. Assertion :$E^{\circ }$ for $M{n}^{3+}/M{n}^{2+}$ is more positive than $C{r}^3/C{r}^{2+}$. Reason: The third ionization energy of $Mn$ is larger than that of $Cr$.

Q. Consider the following steps. $A\left(g\right)\underset{E_1}{\overset{}{\to }}{A}^{+}\left(g\right)\underset{E_2}{\overset{}{\to }}{A}^{2+}\left(g\right)\underset{E_3}{\overset{}{\to }}{A}^{3+}\left(g\right)$Third ionization energy of $A\left(g\right)$ is ?