Down the group electron affinity decreases due to increase in atomic radii. Here is an exception fluorine has low electron affinity than chlorine. This is because due to smaller size of fluorine and electrons are more closely bound together so that incoming electron feels repulsion so additional energy is required to hold the incoming electron.

Full or half-filled orbits reduce electron affinity. Be and N have low electron affinity because their valence shells are full. Symmetry stabilizes filled orbits. These elements will accept the fewest electrons. Electron affinity often follows this trend: Group 1 and 13 metals > Group 2 metals > Halogens. Electron Affinity of Halogens

C l has higher electron affinity than F. On comparing chloride ion with fluoride ion we find that electron density per unit volume in fluoride ion (F −) is more than in chloride (C l −) "ion. This means that coming electron in fluorine atom finds less attraction than in chlorine atom.

2020年8月30日 · The electron affinity of the fluorine is less than chlorine because the size of fluorine is too small as size decreases from left to right inside period, whereas chlorine has a larger size to accommodate electrons hence electron affinity of chlorine is more than fluorine.

We know halogens with outer electronic configuration n s 2 n p 5 have the highest electron affinity. C l has more e − affinity than F due to the small size of F and high electronegativity. And S will have more e − affinity due to the bigger size than oxygen and can accommodate the new incoming e − more easily.

Assertion : F-atom has less electron affinity than C l − atom. Reason: Additional electrons are repelled more effectively by 3 p electrons in C l atom than by 2 p electrons in F -atom. View Solution

The size of C l is having highest electron affinity value than F as the size of F being small and highly electronegative,it tends to repel the incoming electron hence has low affinity than C l but have a higher affinity value than S as sulphur has a large atomic radius compared to C l but O having more electronegativity tends to repel the incoming electron hence has high electron …

Chlorine has more negative electron affinity than fluorine. Because adding an electron to fluorine 2p orbital causes greater repulsion than adding an electron to chlorine 3p orbital which is larger in size. Note: The electron affinity (in kJ/mol) of Cl, F and O is − 349, − 328 and − 141 respectively.

Electron affinity increases in a period and decreases in a group. But, fluorine atom, due to its small size cannot release high amount of energy. Hence, among halogens, chlorine atom has high value of electron affinity and the order is C l > F > B r > I.

In general, the electron affinity decreases down the group but the electron affinity for chlorine is more than that for fluorine, because in F, due to the small size of the atom, the electrons are already crowded. Entry of one more electron results in more repulsion, which leads to absorption of some energy released is less than what is expected.