1. What is electron affinity?The attraction of electrons to an atom or ion.The energy to remove an electron.The energy difference between the lowest state of a neutral atom and the lowest state of the corresponding positive atom, in its gaseous state.The energy difference between the lowest state of a neutral atom and the lowest state of the corresponding negative atom, in its gaseous state.

Electron affinity is the energy change that occurs when an electron is added to a neutral atom in the gaseous state to form a negative ion. It is a measure of the attraction of the atom for the added electron. In other words, it is the energy difference between the lowest state of a neutral atom and the lowest state of the corresponding negative atom, in its gaseous state. It is not the energy to remove an electron, that is ionization energy.