[icarus-custom-lesson-iframe src=”https://phet.colorado.edu/sims/html/isotopes-and-atomic-mass/latest/isotopes-and-atomic-mass_en.html” title=”PhET Interactive Simulations | L04 Isotopes and Atomic Mass”]
NOTE:
The following element has 4 naturally occurring isotopes: S.
The following elements each has 3 naturally occurring isotopes: O, Ne, Mg, Si, and Ar.
The following elements each has 2 naturally occurring isotopes: He, Li, B, C, N, and Cl.
The following elements each has only 1 naturally occurring element: Be, F, Na, Al, and P.
Hence, for a user-defined mixture, you must add a certain number of balls for each isotope and the applet will calculate the molar percent composition and the average atomic mass for the mixture, as well.
