The increasing order of electron affinity for | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The electronic configurations correspond to the following elements:$I$: $1s^2 2s^2 2p^6 3s^2 3p^5$ is Chlorine $(Cl)$.$II$: $1s^2 2s^2 2p^3$ is Ni

Vedclass · Accepted Answer

$II < IV < III < I$

Vedclass · Answer

(A) The electronic configurations correspond to the following elements:$I$: $1s^2 2s^2 2p^6 3s^2 3p^5$ is Chlorine $(Cl)$.$II$: $1s^2 2s^2 2p^3$ is Nitrogen $(N)$.$III$: $1s^2 2s^2 2p^5$ is Fluorine $(F)$.$IV$: $1s^2 2s^2 2p^6 3s^2 3p^1$ is Aluminium $(Al)$.Electron affinity generally increases across a period and decreases down a group.However,Nitrogen $(N)$ has a half-filled $p$-orbital $(2p^3)$,making it very stable,resulting in a very low (near zero or negative) electron affinity.Fluorine $(F)$ has a smaller size than Chlorine $(Cl)$,leading to inter-electronic repulsions,which makes the electron affinity of $Cl$ higher than $F$.Aluminium $(Al)$ is a metal with a low electron affinity.Thus,the order is $N < Al < F < Cl$,which corresponds to $II < IV < III < I$.

The increasing order of electron affinity for the given electronic configurations of elements is:
$I$. $1s^2 \ 2s^2 \ 2p^6 \ 3s^2 \ 3p^5$ $(Cl)$
$II$. $1s^2 \ 2s^2 \ 2p^3$ $(N)$
$III$. $1s^2 \ 2s^2 \ 2p^5$ $(F)$
$IV$. $1s^2 \ 2s^2 \ 2p^6 \ 3s^2 \ 3p^1$ $(Al)$

Similar Questions

Which of the following electron affinity orders is incorrect?

The formation of the $O^{2-}$ ion is first exothermic and then endothermic,as shown by the following reaction steps:
$O_{(g)} + e^- \to O^-_{(g)}; \Delta H^o = -142 \ kJ \ mol^{-1}$
$O^-_{(g)} + e^- \to O^{2-}_{(g)}; \Delta H^o = 844 \ kJ \ mol^{-1}$
This is due to:

When the first electron gain enthalpy $(\Delta _{eg}H)$ of oxygen is $-141 \ kJ/mol,$ its second electron gain enthalpy is

Which group elements easily accept $1$ and $2$ electrons to achieve noble gas electronic configurations? Why?

Which of the following processes is endothermic?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

The increasing order of electron affinity for the given electronic configurations of elements is:$I$. $1s^2 \ 2s^2 \ 2p^6 \ 3s^2 \ 3p^5$ $(Cl)$$II$. $1s^2 \ 2s^2 \ 2p^3$ $(N)$$III$. $1s^2 \ 2s^2 \ 2p^5$ $(F)$$IV$. $1s^2 \ 2s^2 \ 2p^6 \ 3s^2 \ 3p^1$ $(Al)$