Answer: Here are some examples of atoms that behave similarly to chlorine in terms of electron affinity:
Fluorine (F) has the highest electron affinity of any element, so it is more electronegative than chlorine. However, fluorine and chlorine are both halogens, which means that they have similar chemical properties.
Bromine (Br) is also a halogen, and it has a very similar electron affinity to chlorine. In fact, bromine is often used as a substitute for chlorine in organic chemistry.
Iodine (I) is the third halogen, and it has a slightly lower electron affinity than chlorine. However, iodine is still a very electronegative element, and it behaves similarly to chlorine in many chemical reactions.
Nitrogen (N) is not a halogen, but it has a relatively high electron affinity. This is because nitrogen has a small atomic radius, which means that its valence electrons are held more loosely than the valence electrons of larger atoms.
Oxygen (O) is also not a halogen, but it has a relatively high electron affinity. This is because oxygen has a small atomic radius and it also has two unpaired valence electrons.
Explanation: Fluorine has the highest electron affinity, followed by chlorine, bromine, and iodine.
Nitrogen and oxygen also have high electron affinities because they have small atomic radii and unpaired valence electrons.
Atoms with high electron affinity are more likely to attract electrons, which means they are more electronegative.