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   Best Answer

   Exampix Verified

   2022-08-18T02:21:50+00:00Added an answer on August 18, 2022 at 2:21 am

   Solution

   • Chlorine has the highest electron affinity from the elements listed above and also from all the elements in the periodic table
   • The electron affinity of an element is defined as the ease with which it can accept an electron
   • The correct order is Chlorine > Fluorine > Sodium > Helium
   • Electron affinity is defined as the change in energy (in kJ/mole) :
     • Fluorine (F) -328 kJ mol-1
     • Chlorine (Cl) -349 kJ mol-1
     • Bromine (Br) -324 kJ mol-1
     • Iodine (I) -295 kJ mol-1

   Additional Information

   Name	Symbol	Atomic Number
   Sodium	Na	11
   Helium	He	2
   Chlorine	Cl	17
   Fluorine	F	9

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