Which elements in a period have the maximum and minimum ionization enthalpy?

$A \to A^{+} + e, E_{1}$ and $A^{+} \to A^{2+} + e, E_{2}$. The energy required to pull out the two electrons are $E_{1}$ and $E_{2}$ respectively. The correct relationship between the two energies is:

The first $I.P.$ of $Mg$ is ...... than $Al$.

Which of the following elements are at the peaks of the ionization energy trend?

Which one of the following orders is correct for the first ionisation energies of the elements?

Observe the following statements.
Statement $(A)$: In general,the ionisation potential value decreases on moving down in the group.
Statement $(B)$: The $1$st ionisation potential of sodium is greater than that of potassium.
Correct answer is: