Question

what is electron affinity

Answer 1

in simple language
Electron affinity or Electron gain enthalpy is the amount of energy released while converting a neutral isolated gaseous atom into a negetively charged gaseous ion by the addition of electron.
Hope it helps!!

Answer 2

The electron affinity is defined as the energy change that occurs when an atom gains an electron, releasing energy in the process. Let's remember that an electron is negatively charged, so when an atom gains an electron, it becomes a negative ion.