why chlorine is most negative in its group?
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it is due to small size of fluorine.. Cl has greater electron affinity than F
Puja143:
what is electron affinity?
electron affinity is defined as amount of energy released or spend when electron is added to neutral atom or molecule in gaseous state to form negative ion
cl has highest electron affinity
Answered by
5
In group 17, the elements lack 1 Electron to complete octet. Thus the elements try to attract one Electron.
The smaller the size of the element, the greater will be its nuclear force to attract an Electron. Hence fluorine should be most negative and chlorine should be next. BUT due to small size of fluorine, the 7 electrons which are already there repel each other. hence it takes very large energy to insert one more Electron. whereas in case of chlorine, due to its larger size than fluorine, this doesn't happen. Hence chlorine is most negative units group.
The smaller the size of the element, the greater will be its nuclear force to attract an Electron. Hence fluorine should be most negative and chlorine should be next. BUT due to small size of fluorine, the 7 electrons which are already there repel each other. hence it takes very large energy to insert one more Electron. whereas in case of chlorine, due to its larger size than fluorine, this doesn't happen. Hence chlorine is most negative units group.
nice answer
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