The correct order of electron affinity is:

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

Question

(B) Electron affinity is the energy released when an electron is added to a neutral gaseous atom. Generally,electron affinity increases across a perio

Vedclass · Accepted Answer

$N < O < S < Cl$

Vedclass · Answer

(B) Electron affinity is the energy released when an electron is added to a neutral gaseous atom. Generally,electron affinity increases across a period and decreases down a group. However,due to small size and inter-electronic repulsion,the electron affinity of $O$ is less than $S$,and $N$ has a very low (near zero) electron affinity due to its stable half-filled $2p^3$ configuration. Thus,the correct order is $N < O < S < Cl$.

Similar Questions

Select the process in which the least enthalpy change is associated:

The formation of the oxide ion $O_{(g)}^{2-}$ requires first an exothermic and then an endothermic step as shown below. This is because
$O_{(g)} + e^{-} \rightarrow O_{(g)}^{-}; \Delta H^{o} = -142 \ kJ \ mol^{-1}$
$O_{(g)}^{-} + e^{-} \rightarrow O_{(g)}^{2-}; \Delta H^{o} = 844 \ kJ \ mol^{-1}$

The electron affinity values for the halogens show the following trend:

Explain the trends in electron gain enthalpy across periods and down groups.

Which of the following ions is most unlikely to exist?

Vedclass Test Series

Exam Paper Generator

Online Exam Module