Flourine has electron affinity less than that of chlourine why?
confussion is if electrons in flourine are tightly packed means it has high density then when electron is added in it its remainig electron should repel it so more energy will b release then why its electeon affinity is low?

Fluorine, which is higher up the group then chlorine, has a lower electron affinity. This is because the electrons in the outermost shell of a fluorine atom are closer together. ... Energy is required to keep the gained electron in the shell, causing fluorine to have a smaller electron affinity than chlorine.

Explanation:

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

gold is my favorite solid.