Question

write a note on electron affinity​

Answer 1

Electron affinities are the negative ion equivalent, and their use is almost always confined to elements in groups 16 and 17 of the Periodic Table. The first electron affinity is the energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous -1 ions.

Answer 2

Answer:

Electron Affinity is defined as the amount of energy released when an electron is added to a gaseous isolated atom or ion.

X(g) + e- ------> X- (g) + Energy (EA)

atom anion

The greater the energy released, the greater is the electron affinity. EA is expressed in eV per atom (or) kJ mol^-1