Results 41 to 50 of about 1,114,043 (348)

Lewis Acid‐Catalyzed Diels‐Alder Reactions: Reactivity Trends across the Periodic Table

open access: yesChemistry, 2021
The catalytic effect of various weakly interacting Lewis acids (LAs) across the periodic table, based on hydrogen (Group 1), pnictogen (Group 15), chalcogen (Group 16), and halogen (Group 17) bonds, on the Diels‐Alder cycloaddition reaction between 1,3 ...
P. Vermeeren   +5 more
semanticscholar   +1 more source

Educational Videogame to Learn the Periodic Table: Design Rationale and Lessons Learned

open access: yesJournal of Chemical Education, 2021
The periodic table allows to easily understand the chemical elements and predict the behavior of theoretical yet undiscovered new elements. Many memorization techniques have been used for learning the periodic table, yet serious games (i.e.
V. Traver   +3 more
semanticscholar   +1 more source

Systematic Search For Evidence of Tetrahedral and Octahedral Symmetries in Subatomic Physics: Follow-up of the First Identification Case in 152Sm [PDF]

open access: yesEPJ Web of Conferences, 2019
In a recent article [1] group-theory representation-methods have been combined with the realistic mean-field calculation results to elaborate new, specifically designed methods of experimental identification of the tetrahedral/octahedral symmetries in ...
Dudek Jerzy   +7 more
doaj   +1 more source

Not Only Hydrogen Bonds: Other Noncovalent Interactions

open access: yesCrystals, 2020
In this review, we provide a consistent description of noncovalent interactions, covering most groups of the Periodic Table. Different types of bonds are discussed using their trivial names. Moreover, the new name "Spodium bonds" is proposed for group 12
Ibon Alkorta   +2 more
doaj   +1 more source

From the Mendeleev periodic table to particle physics and back to the periodic table [PDF]

open access: yes, 2006
We briefly describe in this paper the passage from Mendeleev's chemistry (1869) to atomic physics (in the 1900's), nuclear physics (in the 1932's) and particle physics (from 1953 to 2006).
A.O. Barut   +19 more
core   +6 more sources

Order From Confusion: International Chemical Standardization and the Elements, 1947-1990

open access: yesSubstantia, 2019
The International Union of Pure and Applied Chemistry (IUPAC) is the international standards making body for chemistry whose goal is to create a standardized common language for the global chemistry community.
Ann E. Robinson
doaj   +1 more source

Particular Symmetries: Group Theory of the Periodic System

open access: yesSubstantia, 2020
To this day, a hundred and fifty years after Mendeleev's discovery, the overal structure of the periodic system remains unaccounted for in quantum-mechanical terms.
Pieter Thyssen, Arnout Ceulemans
doaj   +1 more source

How do lizard niches conserve, diverge or converge? Further exploration of saurian evolutionary ecology

open access: yesBMC Ecology and Evolution, 2021
Background Environmental conditions on Earth are repeated in non-random patterns that often coincide with species from different regions and time periods having consistent combinations of morphological, physiological and behavioral traits. Observation of
Nicolás Pelegrin   +4 more
doaj   +1 more source

The Mendeleev-Meyer force project [PDF]

open access: yes, 2016
Here we present the Mendeleev–Meyer Force Project which aims at tabulating all materials and substances in a fashion similar to the periodic table. The goal is to group and tabulate substances using nanoscale force footprints rather than atomic number or
Amadei, Carlo Alberto   +9 more
core   +4 more sources

Zeeman slowing of a group-III atom

open access: yesPhysical Review Research, 2022
We realize a Zeeman slower of an atom in main group III of the Periodic Table, otherwise known as the “triel elements.” Despite the fact that our atom of choice (namely indium) does not have a ground state cycling transition suitable for laser cooling ...
Xianquan Yu   +4 more
doaj   +1 more source

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