Electronegativity is your answer.
Answer:
Either B or C. Composition or the Distance from the Earth.
SI unit of frequency is Hertz(Hz)
One is through sublimation, where the mixture is heated and iodine gets converted into gaseous form, leaving behind the iron fillings.
The other is to get a magnet near the mixture and all the iron fillings get attracted to it while iodine will be left over
Chlorine will have a -1 charge and Tellurium has a -2 charge when they are ions.
