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Homework Help: Elements and similar type of reaction

  1. Sep 10, 2008 #1
    Potassium reacts with Chlorine to produce the ionic solid potassium chloride (KCl). Which elements would you predict would react with Iodine in a similar type of reaction?

    I know that K has a +1 charge and Cl has a -1 charge.

    Iodine has a -1 charge and all the elements in column 1A have a +1 charge.

    I deduced that Cesium has a similar type of reaction when combined with Iodine but are there any other elements that would produce a similar reaction?
  2. jcsd
  3. Sep 10, 2008 #2


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    What led you to Cesium and not the other Group I metals?
  4. Sep 10, 2008 #3
    The atomic mass of K = 39.098 and Cl = 35.453
    I = 126.904 and proportionally Cs = 132.905
  5. Sep 10, 2008 #4


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    What kind of product will you expect from reaction between sodium and iodine? Lithium? Any group I metal? Aren't they similar?
  6. Sep 10, 2008 #5
    I guess I would include elements: Li, Na, K, Rb, Cs, and Fr but I'm not sure about Hydrogen which is not an alkali metal. Is that correct?
  7. Sep 10, 2008 #6


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    The actual atomic mass of atoms does not really have too much of an effect on their reactivity*. Chemical reactions involve atomic/molecular orbitals, so the electrons are the really important part. Atomic mass is important only insofar as it affects the number of electrons that the atom has.

    *This is not true for hydrogen and other sufficiently light atoms where certain quantum effects become important.
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