Differentiate between electron affinity and electro negativity.

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Solution

Electron affinity
Electronegativity
It is an amount of energy liberated when an electron is added to a neutral atom to form a negatively charged ion. It is a chemical property that describes the tendency of an atom or a functional group to attract electrons towards itself.
It is measured in electron volt/atom or kcal/mol or kJ/mol. It is number and has no unit.
It is a property of an isolated atom. It is the property of bonded atom.
It does not change regularly in group or period. It changes regularly in group or period.
An atom has absolute value of electron affinity. An atom has a relative value of electronegativity.

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Electron affinity	Electronegativity
It is an amount of energy liberated when an electron is added to a neutral atom to form a negatively charged ion.	It is a chemical property that describes the tendency of an atom or a functional group to attract electrons towards itself.
It is measured in electron volt/atom or kcal/mol or kJ/mol.	It is number and has no unit.
It is a property of an isolated atom.	It is the property of bonded atom.
It does not change regularly in group or period.	It changes regularly in group or period.
An atom has absolute value of electron affinity.	An atom has a relative value of electronegativity.