Increasing order of electron affinity is :-

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

Question

(C) The electron affinity $(EA)$ generally increases across a period from left to right and decreases down a group.Comparing the given elements: $N$ (

Vedclass · Accepted Answer

$N < Al < O < Cl$

Vedclass · Answer

(C) The electron affinity $(EA)$ generally increases across a period from left to right and decreases down a group.Comparing the given elements: $N$ (Group $15$,Period $2$),$O$ (Group $16$,Period $2$),$Cl$ (Group $17$,Period $3$),and $Al$ (Group $13$,Period $3$).$1$. $Al$ is a metal and has the lowest tendency to gain electrons,so it has the lowest electron affinity.$2$. Among $N$,$O$,and $Cl$: $N$ has a stable half-filled $p$-orbital $(2p^3)$,making its electron affinity very low (even lower than $O$).$3$. $Cl$ has the highest electron affinity among these due to its smaller size and effective nuclear charge compared to $Al$,and it is higher than $O$ because $O$ has high inter-electronic repulsion in its small $2p$ orbital.The correct order is $N < Al < O < Cl$.

Similar Questions

What is electron gain enthalpy $\left( \Delta_{eg} H \right)$? When does its value become positive and negative?

Which of the following statements is correct?

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

The value of $2^{nd}$ electron gain enthalpy for $O$ and $S$ will be (in $kJ/mol$)

Electron affinity depends on

Vedclass Test Series

Exam Paper Generator

Online Exam Module