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what is the correct order of second ionisation potential of carbon,nitrogen,oxygen,fluorine and why?

Asked by imtiyazmulla68 28th June 2017, 5:44 PM
Answered by Expert
Answer:
The correct order of second ionisation potential of carbon, nitrogen, oxygen, fluorine is:
O>F>N>C.
 
 
Nitrogen: [He] 2s2 2p3  
 
Oxygen: [He] 2s2 2p4  
 
Fluorine: [He] 2s2 2p5  
 
Carbon: [He] 2s2 2p
 
 
After removing one electron:
 
Nitrogen: [He] 2s2 2pAfter removal of one more electron, it will have only one electron in its outermost p subshell.
 
Oxygen: [He] 2s2 2pAfter removal of one more electron, it will have two electrons in p subshell which makes it very unstable. So have very high IP.
 
Fluorine: [He] 2s2 2p4   - After removal of one more electron, it wll occupy stable half filled configuration.
 
Carbon: [He] 2s2 2p1 - After removal of one more electron, it will occupy ideal gas configuration. Hence it will easily give away second electron having very low second IP. 
 
Answered by Expert 29th June 2017, 12:57 PM
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