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  • 2016
  • As of 2016 [update] people use Atom and other web-syndication formats for many purposes, including journalism, marketing, bug-reports, or any other activity involving periodic updates or publications. (wikipedia.org)
  • scientists
  • Many accounts of the atom begin with a history of the growth in scientists' understanding of its structure, but here we will take the opposite approach, first discussing the atom in terms of what physicists and chemists today understand. (encyclopedia.com)
  • While it is true that physicists study atomic structure, and that much of what scientists know today about atoms comes from the work of physicists, atomic studies are even more integral to chemistry than to physics. (encyclopedia.com)
  • A powerful new x-ray free-electron laser will, for the first time, allow scientists to "see" exactly how atoms interact with one another. (lanl.gov)
  • Scientists at TU Wien (Vienna) can now explain how platinum atoms can form pairs with the help of carbon monoxide. (innovations-report.com)
  • Scientists at TU Wien (Vienna), together with colleagues from Utrecht University, can now watch single platinum atoms form tiny clusters. (innovations-report.com)
  • IBM in atoms was a demonstration by IBM scientists in 1989 of a technology capable of manipulating individual atoms. (wikipedia.org)
  • It was not until the 19th century that the idea was embraced and refined by scientists, when the blossoming science of chemistry produced discoveries that only the concept of atoms could explain. (wikipedia.org)
  • ratios
  • In the early 1800s, John Dalton used the concept of atoms to explain why elements always react in ratios of small whole numbers (the law of multiple proportions). (wikipedia.org)
  • CHEMISTRY
  • People who are not scientifically trained tend to associate studies of the atom with physics, not chemistry. (encyclopedia.com)
  • The ability of atoms to associate and dissociate is responsible for most of the physical changes observed in nature and is the subject of the discipline of chemistry . (wikipedia.org)
  • The development of QTAIM was driven by the assumption that, since the concepts of atoms and bonds have been and continue to be so ubiquitously useful in interpreting, classifying, predicting and communicating chemistry, they should have a well-defined physical basis. (wikipedia.org)
  • lasers
  • In terms of quantum control by exciting the atoms with time-dependent lasers one can turn on and off the interaction between atoms and create entanglement between atoms. (uni-ulm.de)
  • Achieving BEC requires cooling the atoms beyond the limits of laser cooling, which means the lasers used in the MOT must be turned off and a new method of trapping devised. (wikipedia.org)
  • In many experiments with atoms, the roles of matter and light are reversed compared to the laser based interferometers, i.e. the beam splitter and mirrors are lasers while the source instead emits matter waves (the atoms). (wikipedia.org)
  • electromagnetic
  • By measuring the electron's properties so meticulously, physicists could improve their calculation of the fine structure constant, the number that determines the strength of the electromagnetic forces that hold all atoms together. (innovations-report.com)
  • smallest
  • Nonetheless, much still remains to be explained about the atom - particularly with regard to the smallest items it contains. (encyclopedia.com)
  • The definitions of atoms and elements seems, at first glance, almost circular: an element is a substance made up of only one kind of atom, and an atom is the smallest particle of an element that retains all the chemical and physical properties of the element. (encyclopedia.com)
  • An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element . (wikipedia.org)
  • experimentally
  • French physicist Jean Perrin used Einstein's work to experimentally determine the mass and dimensions of atoms, thereby conclusively verifying Dalton's atomic theory. (wikipedia.org)
  • surfaces
  • The remarkable behaviour of platinum atoms on magnetite surfaces could lead to better catalysts. (innovations-report.com)
  • For impact on insulator surfaces the potential energy contained by hollow atom may also cause the release of target atoms and -ions via potential sputtering and the formation of nanostructures on a surface. (wikipedia.org)
  • Because QTAIM atoms are always bounded by surfaces having zero flux in the gradient vector field of the electron density, they have some unique quantum mechanical properties compared to other subsystem definitions, including unique electronic kinetic energy the satisfaction of an electronic virial theorem analogous to the molecular electronic virial theorem and some interesting variational properties. (wikipedia.org)
  • characteristic
  • Rather, the defining characteristic of an element is the atom that forms its basic structure. (encyclopedia.com)
  • QTAIM recovers the central operational concepts of the molecular structure hypothesis, that of a functional grouping of atoms with an additive and characteristic set of properties, together with a definition of the bonds that link the atoms and impart the structure. (wikipedia.org)
  • trap
  • This minimum can trap atoms which are low-field-seeking if they do not have enough kinetic energy to escape the minimum. (wikipedia.org)
  • Laser cooling in a magneto-optical trap (MOT) is typically used to cool atoms down to the microkelvin range. (wikipedia.org)
  • physics
  • Atoms are small enough that attempting to predict their behavior using classical physics - as if they were billiard balls , for example - gives noticeably incorrect predictions due to quantum effects . (wikipedia.org)
  • No, the laws of physics didn't change overnight, but our knowledge of how strong atoms are held together did have to be readjusted a bit in light of a new experiment conducted at Harvard University. (innovations-report.com)
  • Although such traps have been employed for many purposes in physics research, they are best known as the last stage in cooling atoms to achieve Bose-Einstein condensation. (wikipedia.org)
  • Atom interferometers have many uses in fundamental physics including measurements of the gravitational constant, the fine-structure constant, the universality of free fall, and have been proposed as a method to detect gravitational waves. (wikipedia.org)
  • tend
  • Like a ball rolling down a hill, these atoms will tend to occupy locations with higher fields and are known as "high-field-seeking" atoms. (wikipedia.org)
  • nucleus
  • In addition to bonding, AIM allows the calculation of certain physical properties on a per-atom basis, by dividing space up into atomic volumes containing exactly one nucleus, which acts as a local attractor of the electron density. (wikipedia.org)
  • Experiments by Ernest Rutherford in 1909 showed the structure of the atom to be a dense, positive nucleus with a light, negative charge orbiting around it. (wikipedia.org)
  • form
  • In fact, these two definitions do not form a closed loop, as they would if it were stated that an element is something made up of atoms. (encyclopedia.com)
  • Sometimes several metal atoms on magnetite form small clusters. (innovations-report.com)
  • When one mobilized platinum atom finds another, they can form a bond - as long as both of them are being lifted up by carbon monoxide, diminishing the influence of the magnetite below. (innovations-report.com)
  • Source
  • JSA #7-9) - Atom-Smasher and the JSA watched a news bulletin about a disturbance in Milwaukee, and Sentinel correctly guessed that his son Obsidian was the source of the trouble. (angelfire.com)
  • Science
  • But then one day, your science teacher says that everything in the world is made up of the same basic components, called atoms. (hobartpulp.com)
  • made
  • An element, on the other hand, is - as stated in its definition - made up of only one kind of atom. (encyclopedia.com)
  • context
  • Atom, on the other hand, uses the standard xml:lang attribute to make it possible to specify a language context for every piece of human-readable content in the feed. (wikipedia.org)