The einstein problem: Molecular chirality leads to unexpected aperiodic patterns on metal surfaces
Standing at the intersection between mathematics and the tiler's trade is the so-called einstein problem. Despite its name, ...
Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...
C&EN16d
How Do the Valency and Radii of Cations Affect the Rheological Properties of Aqueous Solutions of Zwitterionic and Anionic Surfactant Mixtures?
Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, ul. Berdychowo 4, PL 60-965 Poznan, Poland ...
ExtremeTech19d
What Are Semiconductors, and What Are They Made Of?
In contrast, P-type semiconductors use a dopant element from group III on the periodic table (such as boron, indium, or gallium). These elements have only three electrons in their valence shell ...
Frontiers24d
Perspective on the development of XPS and the pioneers who made it possible
One of us (PMAS) remembers his first chemistry lecture at high school in January 1959 when the focus was on the periodic table and he was told about core electrons and valence electrons, specifically ...
jagranjosh.com24d
JEE Mains 2025 Chemistry Study Strategy: Important and Scoring Chapters PDF
Quantum mechanical approach to covalent bonding: Valence bond theory - its important ... Modern periodic law and present form of the periodic table, s, p. d and f block elements, periodic trends ...
C&EN28d
Alchemical Free-Energy Calculations at Quantum-Chemical Precision
Institute for Molecular Modeling and Simulation, Department of Material Sciences and Process Engineering, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, Vienna 1190, Austria ...