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(C) The element with a very high ionization enthalpy and zero electron affinity is a noble gas. Noble gases have a stable electronic configuration ($n

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$He$

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(C) The element with a very high ionization enthalpy and zero electron affinity is a noble gas. Noble gases have a stable electronic configuration ($ns^2 np^6$,except $He$ which is $1s^2$),which makes it extremely difficult to remove an electron (high ionization enthalpy). Additionally,because their valence shells are completely filled,they have no tendency to accept an additional electron,resulting in zero or positive electron affinity. Among the given options,$He$ is a noble gas.

$(IP)_1$	$7.1 \ eV$
$(IP)_2$	$10.3 \ eV$
$(IP)_3$	$36.2 \ eV$
$(IP)_4$	$39.1 \ eV$

The element having very high ionization enthalpy but zero electron affinity is

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$(IP)_1$ $7.1 \ eV$
$(IP)_2$ $10.3 \ eV$
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