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The first (IE1) and second (IE2) ionisat...

The first `(IE_1)` and second `(IE_2)` ionisation enthalpies `("kJ mol"^(-1))` of a few elements designated by Roman numerals are shown below.
`{:(,,IE_(1),IF_(2)),(,I,2372,5251),(,III,900,1760):}` `{:(,,IE_(1),IE_(2)),(,II,520,7300),(,IV,1680,3380):}`
Which of the above element is likely to be:
a noble gas

Text Solution

Verified by Experts

Since noble gases have very high ionization enthalpies, therefore, element I is a noble gas.
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