Explain why the electron gain enthalpy of fluorine is less negative than that of chlorine.
(N/A) The electron gain enthalpy of fluorine is less negative than that of chlorine due to its small atomic size.
In fluorine,the incoming electron experiences significant inter-electronic repulsion because the $2p$ orbitals are compact.
In contrast,chlorine has a larger atomic size and the incoming electron enters the $3p$ orbital,which has more space available.
This results in less inter-electronic repulsion in chlorine,making the process more exothermic and leading to a more negative electron gain enthalpy compared to fluorine.
In fluorine,the incoming electron experiences significant inter-electronic repulsion because the $2p$ orbitals are compact.
In contrast,chlorine has a larger atomic size and the incoming electron enters the $3p$ orbital,which has more space available.
This results in less inter-electronic repulsion in chlorine,making the process more exothermic and leading to a more negative electron gain enthalpy compared to fluorine.
Explore More
Similar Questions
Which group elements easily accept $1$ and $2$ electrons to achieve noble gas electronic configurations? Why?
Easy
View SolutionThe formation of oxide ion $O^{2-}$ from oxygen atom requires an exothermic reaction,followed by an endothermic step as shown below. The process of formation of $O^{2-}$ in gas phase is unfavorable $(\Delta H^{\ominus} = +ve)$,even though it has the stable configuration of the nearest noble gas neon. This is because:
$O_{(g)} + e^{-} \longrightarrow O^{-}_{(g)} ; \Delta H^{\ominus} = -141 \ kJ \ mol^{-1}$
$O^{-}_{(g)} + e^{-} \longrightarrow O^{2-}_{(g)} ; \Delta H^{\ominus} = +760 \ kJ \ mol^{-1}$
$O_{(g)} + e^{-} \longrightarrow O^{-}_{(g)} ; \Delta H^{\ominus} = -141 \ kJ \ mol^{-1}$
$O^{-}_{(g)} + e^{-} \longrightarrow O^{2-}_{(g)} ; \Delta H^{\ominus} = +760 \ kJ \ mol^{-1}$
Arrange $S$,$O$,and $Se$ in ascending order of electron affinity.
Easy
View SolutionFor electron gain enthalpies of the elements denoted as $\Delta_{eg} H$,the incorrect option is :
The electron gain enthalpy (in $kJ/mol$) of fluorine,chlorine,bromine and iodine,respectively,are:
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo