Question

What is the basic difference between the terms electron Gain Enthalpy and electronegativity?

Answer 1

Basic difference between electron Gain Enthalpy and electronegativity

Serial number	Electron gain enthalpy	Electronegativity
1	"When an electron is added to a neutral gaseous atom (X) to convert it into a negative ion, the enthalpy change accompanying the process is defined as the Electron Gain Enthalpy."	“A qualitative measure of the ability of an atom in a chemical compound to attract shared electrons towards itself is called electronegativity.”
2	It is a measurable quantity.	It is not a measurable quantity.
3	Electron gain enthalpy becomes more negative as we go left to right across a period.	In general, electronegativity increases across a period from left to right.
4	Electron gain enthalpy becomes less negative as we go down a group.	In general, electronegativity decreases down a group in the periodic table.
5	The units of electron gain enthalpy are $\mathrm{kJ}{\mathrm{mol}}^{-1}$.	It has no units.