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.

The modern periodic table, arranged in rows and columns ... the spherical s and p₁/₂ electron shells contract and become more stable. These elements have a nonzero electron density at the nucleus, ...

Observations are consistent with this effect: GnRH agonists decrease bone mineral density and increase fracture risk in men with prostate cancer. Estrogens play a central role in homeostasis of ...

China has imposed export restrictions on five essential metals, including tungsten and indium, which are crucial for defense, clean energy, and other industries. This move came shortly after the U.S.

Feb 4 (Reuters) - China announced export controls on Tuesday targeting five metals used across defence, clean energy and other industries minutes after an additional 10% tariff on Chinese goods ...

If you get into working on bigger puzzles, they can eat up your dining room table, coffee table or desk space for long stretches of time. This is why many jigsaw fans have a dedicated puzzle ...

Metal prices were pressured lower after U.S. President Trump imposed tariffs on Canada, Mexico and China. LME three-month copper fell 1.2% to $8,958 a metric ton and LME three-month aluminum ...

A new investigation reveals that many plant-based, organic, and chocolate-flavored protein powders contain high levels of heavy metals such as lead and cadmium. Despite being marketed to health ...

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China Department of Pathology, The First Affiliated Hospital of USTC, Division of Life Sciences ...