Friday, April 19, 2019
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On The Rocks: Periodic Table of Chemical Elements

By Bob Jones In December 2017, at the United Nations General Assembly, 72nd session, in New York City, the membership proclaimed the year 2019 to...
Periodic Table of Natural Elements

On The Rocks: Natural Elements

By Bob Jones The first time I walked into a science classroom one wall had a huge chart hanging on it. The chart was covered with...