please explain why chlorine is more electonegative than flourine however in p-block metallic character increses? please don't repeat the same answer.
Please note that fluorine is indeed more electronegative than chlorine. In fact, fluorine is the most electronegative element in the periodic table. It is much smaller in size than chlorine and has a greater tendency to attract electrons than chlorine.
However, the electron gain enthalpy of chlorine is more negative than fluorine. This is because fluorine is smaller in size than chlorine. Thus the extent of electron-electron repulsion would be more in fluorine than in chlorine. Because of this, the incoming electron would face more repulsion in fluorine than in chlorine. Chlorine on the other hand being larger in size, accepts the electron more readily than fluorine.
In other words, the chloride ion is formed more easily than the fluoride ion.