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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?

A

M,N

B

N,O

C

O,P

D

M,P

Text Solution

Verified by Experts

The correct Answer is:
B
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