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Electronic Structure of Superheavy Atoms. Revisited.
Electronic Structure of Superheavy Atoms. Revisited.

... more than the critical value Zc = α−1 ' 137, 04, where α is the finite structure constant, is of fundamental importance. The formulation of QED cannot be considered really completed until an exhaustive answer to this question is given. Although nuclei with overcritical charges can hardly be synthesi ...
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... Write balanced chemical equations for each of the following. Pay close attention to the physical states! Also - you must include the charge when writing ions, otherwise your answer is incorrect. Do not balance these equations using fractions for coefficients. sulfur dioxide gas combines with oxygen ...
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... for some function V (x), called the potential energy. (This is the 3D equivalent of F = −V 0 (x) in 1D; in 1D all force fields F (x) are conservative.) But in 3D, not all force R Bfields are conservative, because (as shown in the Vector Calculus course) the value of a line integral A F . dx depends, ...
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... Water is a good solvent for ionic compounds because it is a polar molecule. The polarity of water results from electron distributions within the molecule. The oxygen atom has an attraction for the hydrogen atoms’ electrons and is therefore partially negative compared to hydrogen. The oxygen atom is ...
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Atomic theory



In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms. It began as a philosophical concept in ancient Greece and entered the scientific mainstream in the early 19th century when discoveries in the field of chemistry showed that matter did indeed behave as if it were made up of atoms.The word atom comes from the Ancient Greek adjective atomos, meaning ""uncuttable"". 19th century chemists began using the term in connection with the growing number of irreducible chemical elements. While seemingly apropos, around the turn of the 20th century, through various experiments with electromagnetism and radioactivity, physicists discovered that the so-called ""uncuttable atom"" was actually a conglomerate of various subatomic particles (chiefly, electrons, protons and neutrons) which can exist separately from each other. In fact, in certain extreme environments, such as neutron stars, extreme temperature and pressure prevents atoms from existing at all. Since atoms were found to be divisible, physicists later invented the term ""elementary particles"" to describe the ""uncuttable"", though not indestructible, parts of an atom. The field of science which studies subatomic particles is particle physics, and it is in this field that physicists hope to discover the true fundamental nature of matter.
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