[arlaness]

Hi, i would like to know why Chlorine has a higher electron affinity than Flourine. Hope someone can enlighten me thanks

[lft123]

Hi,

have you some notions of quantum mechanics ?
Do you know something know as "Slater's rules" ?
If yes you could have an explanation by calculating "effective charge" of an electron taking in account schielding effect creating by others électrons you will find Z* for F = 5.2 and for Cl = 6.1 so that's why Chlorine has a higher electron affinity

[arlaness]

yes i do know some notions in quantum mechanics and i've heard of slater's rules. But I did not go further into this topic at the moment. Would be nice if someone can tell me more aboutthis rule and how it works in calculating the nuclear effective charge. thanks

[Borek]

Remember: library first, wiki/google second, ask on forums third!

[arlaness]

ok, thanks a lot