Tag Archives: IYPT2019

The Evolving Periodic Table

beknouse/ February 21, 2019/ Uncategorized/ 0 comments

One-hundred and fifty years ago, Dmitri Mendeleev first presented his periodic system to the Russian Chemical Society, forever shaping the way we look at the elements. His system, which organized the elements based on atomic weight, valence, and measurable properties, laid the foundation for today’s Periodic Table. In honor of this, The United Nations has declared 2019 to be the

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