In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical ? Choose the correct answer from the options given below :

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In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical ?

Choose the correct answer from the options given below :

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Ar and Kr

Na and K

Rb and CS

I and At

answer is C.

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Detailed Solution

Rb & Cs have electron gain enthalpy electron gain enthalpy as -46 and -47 kj/mol whereas for

$Ar & Kr have e x a c t l y same Value = + 96 kj / m o l .$

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