1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Isotope problem

  1. Jan 24, 2009 #1
    how would you set this up to solve this problem

    A newly discovered element occurs naturally as the two isotopes: 108X and 114X. In nature 65.8 % of is the isotope 108X and the remaining percentage is 114X. What is the mass number for element X.
  2. jcsd
  3. Jan 24, 2009 #2
    Well basically when giving the mass number for an element, in your case X you take the average of the masses, which obviously changes with the percentages of the respective ones, in this case

    (( 65.8 * 108 ) + ( 34.2 * 114 )) / 100 = It's average mass number which turns out to be 110.05!

    Sorry if I can't explain it that well, but basically, you take the mass of each one * the percentage of it, add them all up, and divide it by 100. If you're still struggling pm me
  4. Jan 24, 2009 #3
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Isotope problem
  1. Isotope exchange (Replies: 1)

  2. Isotope percentages (Replies: 2)

  3. Bromine isotopes (Replies: 2)