In 1869, Mendeleev's first periodic table did not include them, as closed-shell elements remained undiscovered until Lord Rayleigh and William Ramsey isolated argon in 1894. Remarkably ...

They have the same number of electrons in their outer shell, so similar chemical properties. Sample exam questions - atomic structure and the periodic table - AQA Understanding how to approach ...

Virtual-PeriodicTable is an open-source project designed to provide a customizable and interactive periodic table. Unlike many existing solutions, this project emphasizes simplicity and accessibility, ...

One halcyon spring day in 1903, the 69-year-old anatomist and naturalist Dr. James Bell Pettigrew sat at the top of a sloping ...

There’s a place in Plain City, Ohio where the cinnamon rolls are so good, they’ve achieved almost mythical status. Der ...

TômTex has also developed sustainable techniques to upcycle crustacean shell into fashion, bags, furniture and other applications. This innovative material is created from the biopolymer chitosan from ...

A nexus for science, education, and cooperation serving the worldwide community of computational molecular scientists. [MolSSI] ...

A clean energy transition is happening all over the world as the worsening climate crisis creates an urgent need to decarbonize energy systems.  Unlike fossil fuels like coal and oil, clean energy ...