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  • Which one of the following statements is correct for the electron gain enthalpy of Ne & He?Option: 1 He has higher <img alt="\Delta _{eg}H^-

Which one of the following statements is correct for the electron gain enthalpy of Ne & He?

Option: 1

He has higher \Delta _{eg}H^- value


Option: 2

Ne has higher \Delta _{eg}H^- value


Option: 3

both have same \Delta _{eg}H^- value


Option: 4

none of these


Answers (1)

best_answer

Electron gain enthalpy of noble gas -

Inert gases have completely filled subshell (ns2 np6) therefore the incoming electron has to enter the next higher principal quantum level, leading to a very unstable electronic configuration.

This is why  \bigtriangleup _{eg}H^{-} of noble gas has a large positive value.

The valence shell of Helium is in 1s. having the lowest energy thus easier to put another electron in the next subshell i.e 2s.

For Ne, there are 2p electrons present, to put another electron need to face repulsion as well as Ne accepts one electron in a much higher energy level i.e 3s.

So, due to these factors Ne has higher \Delta _{eg}H^- value.

Posted by

Shailly goel

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