Ionisation energies of unknown elements ...

Ionisation energies of unknown elements are given below :
`|{:("Element",,"IE(in kcal/mol)",),(," I"," II","III"),(" M",209," "548,919),(" N",100," "735,1101),(" O",119," "1092,1653),(" P",1500," "2017,2320):}|`
Which pair of elements may represent same group?

M,N

N,O

O,P

M,P

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Ionisation energies of unknown elements are given below : |{:("Element",,"IE(in kcal/mol)",),(," I"," II","III"),(" M",209," "548,919),(" N",100," "735,1101),(" O",119," "1092,1653),(" P",1500," "2017,2320):}| Which amongst them is expected to be a noble gas?

less than p-block elements

more than s-block elements

less than s-block elements

more than p-block elements.

The same as the electron affinity of the element

Equal in magnitude but of opposite sign to the electron affinity of the element

The energy released when an electron is added to an atom of the element

The energy required to remove the outermost electron of an atom of the element