A rendering of 3D model of methane molecule
Chemistry

What Are Hydrocarbon Compounds?

September 19, 2021

The chemistry of carbon is diverse because of two factors. First, every carbon atom needs four additional electrons. And, second, it can satisfy the need for these four electrons by bonding not only to hydrogen but also to itself. […]

The position of fluorine in the periodic table.
Chemistry

Completing Mendeleev’s Periodic Table

August 22, 2021

The periodic table had clear gaps that required predictions, and many of those predictions were filled when new elements predicted by Mendeleev were subsequently discovered. […]

An image of pure antimony.
Chemistry

The Concept of Chemical Elements

August 22, 2021

Throughout the 18th and 19th centuries, chemists identified more and more new chemical elements, adding to the dozen or so elements that had been known to the ancients. […]

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