The!Mad!Scientist!
  • Home
  • Courses
    • IB Chemistry Home Page
    • IB Biology Home Page
    • General Chemistry
  • G10 Science Home Page
  • Calendar

Isotopes 

Atoms with different numbers of neutrons are called isotopes.  For instance, carbon has fifteen known isotopes, but only three are commonly referenced: carbon-12, carbon-13, and carbon-14.

All three isotopes have six protons (carbon's atomic number), but C-12 has 6 neutrons, C-13 has 7 neutrons, and C-14 has 8 neutrons.

Average Atomic Mass & Percent Abundance

Here are two videos from ChemisNATE that shows a quick and easy way to calculate average atomic mass.  The second video shows how to calculate percent abundance.
Proudly powered by Weebly