Explain the following phenomena. why Fluorine has lower electron affinity than chlorine​

Electron affinity for fluorine is than chlorine most likely , due to the electron repulsion that occur between the electron where n= 2 . the elements in the second period have such small electron clouds that electron repulsion is greater than that of the rest of the family.

Fluorine ,through higher than chlorine in the periodic table,has a very small atomic size.This makes the fluoride anion so formed unstable(Highley reactive) due to very high charge/mass/ratio. ...As a result,fluorine has an electron affinity less than that of Chlorine.

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a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements