electron gain enthalapy

can anyone plz explain me why electron gain enthalpy denoted by reacton:
X + e- → X-
of all elements is mostly negative in value.This means that X- is more stable than X for most elements .How?
plz explain.

1 Answers

1
Vinay Arya ·

Yes,it is represented by that reaction.What is electron gain enthalpy?Electron gain enthalpy means the energy required to form an anion.You see that some elements want to gain electron to complete their octet.F,Cl,Br etc. try to get one electron to form an anion.And the energy required to form the anion is electron affinity.And it has to be more stable as the octet has been completed.

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