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!

Abundance of isotopes

  1. Oct 15, 2007 #1
    Element x has two naturally occurring isotopes. The masses (amu) and % abundance are given. 31x is 35% with mass of 31.16 and 34x is 64% with 34.3 amu's
  2. jcsd
  3. Oct 16, 2007 #2
    i suppose you have to calculate the atomic mass of the element??!! huh

    let's take the example of chlorine, which has two istopes too. Cl-35 and Cl-37, in the ratio of 3:1.

    on average, chlorine atoms have atomic mass of: [(35 * 3) + (37 * 1)] / 4

    similarly, you can calculate the atomic mass of x, if that's what you were asking??!!
  4. Oct 19, 2007 #3


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Are you familiar with the term 'weighted average'?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Abundance of isotopes
  1. Isotopic symbols (Replies: 6)