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The first (IE(1)) and the second (IE(2))...

The first (`IE_(1)`) and the second `(IE_(2))` ionisation energies (kJ `mol^(-1)`) of a few elements are given below :

Which of the above elements is likely to be
a noble gas?

Text Solution

Verified by Experts

Non-metals have high yet comparable ionization energies. Their values are certainly not as high as those of inert gases but they do show a marked tendency to accept electrons in place of losing them. Here element IV seems to be a reactive non-metal (3) Element I is certainly a noble gas. The values of IE are high as compared to any other. Such elements are non- reactive and do not participate in chemical reactions.
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