Amongst the following elements with their electronic configurations given below,which one has the highest ionization energy?

  • A
    $[Ne] 3s^2 3p^1$
  • B
    $[Ne] 3s^2 3p^3$
  • C
    $[Ne] 3s^2 3p^2$
  • D
    $[Ar] 3d^{10} 4s^2 4p^3$

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

Which is the correct order of ionisation energy?

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The correct order in which the first ionisation potential increases is

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

Given below are two statements. One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: The first ionization enthalpy for oxygen is lower than that of nitrogen.
Reason $R$: The four electrons in $2p$ orbitals of oxygen experience more electron-electron repulsion.
In the light of the above statements,choose the correct answer from the options given below.

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