explain electron gain enthalpy in detail.. please i will mark as brain list
Answers
when a neutral atom of any element accepts an electron, then negative ion is formed and the energy released is called electron gain enthalpy.
neutral atom (g) + e arrow anion (g) + free energy
(electron gain enthalpy).
I hope my answer is correct.
please tick the mark of branliest.
Answer:
1)electron gain enthalpy of an element may be defined as the energy released when a neutral isolated gaseous atom accepts an extra electron to form the gaseous negative ion i.e. anion. It is denoted as ∆egH
2)the ∆egH1 for most of the element is negative while their ∆egH2 is always positive
3)In general, the ∆egH1 becomes more negative from left to right in a period and less negative from up to down in a group
4)the electron gain enthalpy of the elements of second period are less negative than the crossponding element of the third period due to small size as a result of which they strong electron-electron repulsion
5)the overall negative ∆egH if halogen follows the order: Cl>F>Br>I while that of chalogens follows the order:S>Se>Te>Po>O.
6)the ∆egH of element having exactly half filled and completely filled orbitals is positive i.e. ∆egH of Be,Mg,Ca,N and inert gas is positive