Answer:
Electronegativity- is the ability of an atom in a compound to attract the bonding pair of electrons closer to itself.
electron affinity- the energy released when an atom accepts electrons to form a negative ion.
ionization energy - The energy absorbed or released when a neutral atom loses one electron:
Explanation:
If two atoms X-Y constitute a bond, the dash in between the two atoms indicate a shared pair of electrons. If peradventure, Y has a greater ability to attract the electron pair towards itself compared to X making the electron pair to be closer to the nucleus of Y compared to X, we define this property of Y as electro negativity.
Consider an atom X that accepts one mole of electrons to form one mole if negative ion as shown below;
X(g) + e ---> X^- (g)
The energy released by this process in which X accepts an electron and forms a univalent negative ion is known as electron affinity.
Similar, when X looses an electron to form a positive ion, the energy released or absorbed during this process is known as ionization energy.
X(g) ----->X^+(g) + e
