New studies of the “platypus of materials” help explain how their atoms arrange themselves into orderly, but nonrepeating, ...

Hailed as one of the 50 most important women in science, she found ways to study rare radioactive isotopes and advanced the ...

Simply put, molar mass is the mass of one mole of a substance. A mole is a unit for counting particles in chemistry, typically measured in terms of Avogadro’s number, which is 6.022 x 10^23 particles ...

For example, the atomic number of chlorine is 17. Every chlorine atom has 17 protons and 17 electrons. It has 17 positive charges and 17 negative charges, meaning that it is neutral overall. Atoms of ...

Cold atoms could also potentially measure much lower vacuum pressures than ion gauges can. The current lowest pressure they’ve reliably measured is around 10 -9 Pa, and NIST scientists are working on ...

In early 2024, McGill University doctoral student Vishwangi Shah and her colleagues were conducting a routine review of data from the Canadian Hydrogen Intensity Mapping Experiment when they noticed ...

In chemistry, the steric number is an essential concept that describes the arrangement of electron pairs around a central atom in a molecule. It helps predict the molecular geometry and hybridization ...

Bob Giddings Green Bay, Wisconsin Calculating the total mass of the universe is not simple, because most of the mass is invisible. In a pie chart of the contents of the universe, only 5 percent is ...

A memory chip just 10 atoms thick has been tested in a lab and integrated into conventional chips, demonstrating a technology ...

Atoms are the building blocks of everything. Atoms can form strong bonds with each other, making molecules. Symbols and formulae Letters from the alphabet are used to represent chemical elements. An ...

We’ve reached the limit of a very successful way to make new elements in the lab. In new research, scientists unveil a new take on that technology and report its success. The heaviest elements could ...

The Nobel Prize in Physics for 2025 honors scaled-up quantum physics—while sidestepping controversies swirling around quantum ...