Question

long a s in order of most negative to most positive electron amnity Items (5 items) (Drag and drop into the appropriate area) Items in order Most Positive

Answer 1

Electron affinity is defined as the amount of energy relased or absorbed when an electron is added to an isolated gaseuous atom.

The electronegative element will have the higher electron affinity as it seeks electron whereas lesser electronegative element will have lower electron affinity.

Since Ne is noble gas i.e., it has completely filled electron valence shell..it has least tendency to accept the electron. Therefore, a great amount of energy will be needed to supply in order to make it accept electron. That's why Ne will have most positive electron enthalpy.

Since F is most electronegative amongst given elements, it will have highest Electron affinity.

Out Of C, N and O , electron affinity will become more negative for more electronegative element.

But for Nitrogen, there is exception as Nitrogen has half filled subshell is very stable and it will resist the acceptance of electron. So energy has to be supplied to add electron to nitrogen atom and as a result it has positive electron affinity which is greater than Carbon.

Order of electron affinity from most negative to most positive will be :

F>O>C>N>Ne