In common with many other countries, the Iranian science curriculum does not introduce primary children to atoms and molecules but instead leaves the teaching of these concepts until high school. This paper challenges this practice and describes the changes in elementary Iranian children’s understanding...
Generator computes quantum theory of atoms in molecules (QTAIM) features, via density functional theory (DFT), for sets of molecules or reactions in a high-throughput manner, and compiles features into a single data structure for processing, analysis, and geometric machine learning. An accompanying...
The underlying concept of atoms as the basic building blocks of matter has been around for a long time. As early as 600 BCE, the Gujarati (Indian) philosopher Acharya Kanad wrote that "Every object of creation is made of atoms which in turn connect with each other to form molecules". A...
This feature paper gives an overview of the exciting recent developments in this field, focusing mainly on triggering chemical reactions that affect small and large assemblies of molecules adsorbed at a surface. 2. Scanning tunneling microscopy The operating concept of an STM is relatively simple: ...
While the presence of air molecules slows the speed of light by a very small amount, we will use the value of 3.00 × 10 8 m/s as the speed of light in air. Figure 1. The electromagnetic spectrum encompasses a very wide range of wavelengths and frequencies. Visible light is only a ...
Interactive Fishing Game for Building MoleculesInteractive review the history of models of atomsSeveral videos and animationsDrag and drop elements *** Other Key Features:- Checkpoints- Main Points summary- Concept Map- Test Yourself (summary questions) ★This is one of many award winning Science...
Neurons communicateonandoffsignals usingneurotransmitters, tiny molecules that substitute for electricity So really, a brain is just a (mind-bogglingly complex) tangle of neurons that form an astronomical number of logic gates. These logic gates are endlessly being bombarded with neurotransmitters carryin...
Combining single atoms with clusters or nanoparticles is an emerging tactic to design efficient electrocatalysts. Both synergy effect and high atomic utili
These two modified SAPO-34/18 intergrowth catalysts both have abundant mesopores and macropores due to the hierarchical and lamellar architectures, which cannot be observed in the traditional cuboid catalysts (Supplementary Figure 5). They will lead to shorter diffusion distances for guest molecules ...
Some generalizations and generalities: in chemistry, one has literal atoms, which, like tinker toys or jigsaw-puzzle pieces, can hook up one to the other, to form complex molecules. The process is recursive: certain complex molecules, such as DNA and protiens, can further hook up and partici...