On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table.

February 7 is National Periodic Table Day, when we celebrate the efforts of scientists over the centuries to figure out how different elements ...

1 Image Credit: New Africa/Shutterstock.com The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements ...

The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...

There are some 17 elements in the Rare-Earth Elements, or REE, category in the Periodic Table of known elements. According to the EU, Ukraine possesses in its territory some 22 out of 34 of the ...

I am an inorganic chemist. Researchers in my field work to understand the chemistry of all the elements that make up the periodic table. Many inorganic chemists focus on the transition metals ...

The original line-up of heavy metal legends Black Sabbath will play together for the first time in 20 years at a one-off concert in Birmingham, England, this summer, organisers said today (5 February) ...

Figuring out what to do for your first Valentine's Day as a couple can ... but you won’t know until you lay it all out on the table. To prevent awkwardness, hurt feelings, and more, you can ...

Please note: All times UK. Tables are subject to change. The BBC is not responsible for any changes that may be made. Copyright © 2025 BBC. The BBC is not ...

‘I have a dream of walking into a chemistry lecture theatre and seeing two periodic tables – the traditional one and a periodic table in the language of the Gadigal whose land we teach on,’ says ...

We present an efficient and linear-scaling implementation of analytical gradients of Hartree-Fock exchange (HFX) energy for periodic HSE06 calculations with fitted NAOs in the HONPAS package. In our ...