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Homework Help: Mole concept- to find isotopic formula

  1. Jul 10, 2012 #1
    1mole of diatomic element X2 contains 34 and 40 moles of electrons and neutrons respectively, the isoptopic formula of the element is?
    1. The problem statement, all variables and given/known data
    1mole of diatomic element X2 contains 34 and 40 moles of electrons and neutrons respectively


    2. Relevant equations
    all the basic ones!

    3. The attempt at a solution
    The answer from my point of view should be 17X37
     
  2. jcsd
  3. Jul 10, 2012 #2

    Borek

    User Avatar

    Staff: Mentor

    Re: Mole concept- to find isopopic formula

    Looks good.
     
  4. Jul 11, 2012 #3
    Re: Mole concept- to find isopopic formula

    I am assuming that the isotopic formula of the element asks you for that notation where you display both the atomic mass (protons + neutrons) and atomic number (protons).

    Something like 1H1

    Then, let's start from the beginning.

    34 moles of electrons in X2 = 17 electrons in one atom.
    Similarly, 20 neutrons in one atom.

    -------------------

    With this in mind, what will be the atomic mass? What will be the atomic number?
     
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