This is called the ionization energy because the atom gets a positive charge after the removal of an electron and becomes a positively charged ion. Ionization energy is the amount of energy needed by a gaseous atom in order to remove an electron from its outermost orbital. When the atomic number increases, the number of electrons they have in their outermost orbitals increases. The elements of the periodic table are arranged according to the ascending order of their atomic number. This is because the incoming electron is added to the outermost orbitalВ of an atom. Second Electron Affinity: X (g) вЂ“ + e вЂ“ в†’ X (g) -2Д®lectron affinity shows periodic variation in the periodic table. Therefore, the first electron affinities are negative values and the second electron affinity values of the same species are positive values.ДЇirst Electron Affinity: X (g) + e вЂ“ в†’ X (g) вЂ“ This phenomenon is called an endothermic reaction. This is because the incoming electron is repelled by the other electrons. But if another electron is going to be added to this negative ion, energy should be given in order to proceed with that reaction. The addition of an electron to a neutral atom or a molecule releases energy. This can be represented by symbols as follows. This electron addition causes the formation of a negatively charged chemical species. Key Terms: Atom, Electron, Electron Affinity, Electron Gain Enthalpy, First Ionization Energy, Ionization Energy, Second Ionization EnergyД®lectron affinity is the amount of energy released when a neutral atom or a molecule (in the gaseous phase) gains an electron from outside. What is the Difference Between Electron Affinity and Ionization Energy What are the Similarities Between Electron Affinity and Ionization EnergyД¤. вЂ“ Definition, First Ionization, Second IonizationДЈ. вЂ“ Definition, Endothermic and Exothermic Reactions The main difference between electron affinity and ionization energy is that electron affinity gives the amount of energy released when an atom gains an electron whereas ionization energy is the amount of energy required to remove an electron from an atom. Ionization energy, on the other hand, is the amount of energy required to remove an electron from an atom. Electron affinity can be also known as electron gain enthalpy when the meaning is considered, but they are different terms since electron gain enthalpy describes the amount of energy absorbed by the surrounding when an atom gains an electron.

Electron affinity is the amount of energy released when a neutral atom or molecule gain an electron. Electron affinity and ionization energy are two such concepts in chemistry. There are many chemical concepts to explain the behavior of electrons. Main Difference вЂ“ Electron Affinity vs Ionization EnergyД®lectrons are subatomic particles of atoms.

What is electron affinity