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What is Isotopes Matter? This suite of interactive, electronic learning tools was created as part of the development and global dissemination of the IUPAC Isotopic Periodic Table. The online interactive learning resources have been designed to communicate the importance of isotopes and their diverse applications, while helping students and educators understand why atomic weight intervals have been introduced for some elements and how they should be used.

A detailed description of this project (2014-024-1-200) can be found on the IUPAC website.

The IUPAC Project Team:

• Dr. Norman E. Holden, project group co-chair (Brookhaven National Laboratory, USA)
• Dr. Peter Mahaffy, project group co-chair (The King's University and the King's Centre for Visualization in Science, Canada)
• Dr. Tyler B. Coplen (U.S. Geological Survey, USA)
• Dr. Thomas Walczyk (Yong Loo Lin School of Medicine, Singapore)
• Dr. Michael Wieser (University of Calgary, Canada)
• Dr. Brian Martin (The King's University and the King's Centre for Visualization in Science, Canada)
• Dr. Resa Kelly (San Jose State University, USA)
• Prof. Jan Apotheker (Rijksuniversiteit Groningen, Netherlands)
• Prof. Morton Hoffman (Boston University, USA)
• Ms. Lauren Tarbox (U.S. Geological Survey, USA)

The Isotopes Matter Reviewers: In addition to the IUPAC Project Team listed above, we would like to acknowledge the following reviewers for their contributions:

• Juris Meija (Chair of IUPAC Commission on Isotopic Abundances and Atomic Weights, National Research Council Canada)
• Yesha Shrestha (U.S. Geological Survey Contractor, Cherokee Nation Businesses)
• A/Prof Gwendolyn Lawrie (School of Chemistry & Molecular Biosciences, The University of Queensland)
• Mg. Leontina Lazo (Institute of Chemistry, Faculty of Science, Pontifical Catholic University of Valparaíso, Chile)
• Michael Buhr (University Preparation Instructor, Grant MacEwan University)
• Mei-Hung Chiu (Professor, National Taiwan Normal University, Graduate Institute of Science Education)
• Ethel Ríos Orlandi, M.Sc., Ph.D. (Professor, Department of Physical Sciences, College of General Studies, University of Puerto Rico-Río Piedras, Puerto Rico)

The Isotopes Matter Team: These resources were developed by the King's Center for Visualization in Science (King's University, Edmonton)

• Dr. Peter Mahaffy, The King’s University and KCVS
• Dr. Brian Martin, The King’s University and KCVS
• Mckenzie Oliver, The King’s University and KCVS (undergraduate student)
• Tyler deBoon, The King’s University and KCVS (undergraduate student)
• Marc-Olivier Lajeuneuse, University of Alberta and KCVS (undergraduate student)
• Ashley Ritter, The King’s University and KCVS (undergraduate student)
• Rachel Hislop-Hook, The King’s University and KCVS (undergraduate student)