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Chemical Equations and Reactions
Chemical Equations and Reactions

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Lecture-11-10

... Chapter 9 ...
Entangling Dipole-Dipole Interactions and Quantum Logic in Optical
Entangling Dipole-Dipole Interactions and Quantum Logic in Optical

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... The effect of population coherence due to the two optical fields becomes apparent as the atomic population occupying the dark |Di state increases. Under resonant conditions, destructive interference occurs between the transition pathways, and the atoms in the dark state become noninteracting with th ...
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soft error issue and importance of low alpha solders for

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Formation of molecular ions by radiative association of cold
Formation of molecular ions by radiative association of cold

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Common Exam - 2004 Department of Physics University of Utah August 28, 2004

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Unified Interpretation of the Gravitational, Electric, Magnetic, and

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12 momentum impulse mc key File

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Chapter 12 Stoichiometry - Ponder Independent School District

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chm 205 - National Open University of Nigeria
chm 205 - National Open University of Nigeria

... Many elements exist in more than one form. These forms are called allotropes, and the phenomenon is called allotropy. The two common allotropic forms of carbon, viz., diamond and graphite are well-known. These are, in fact, giant macromolecules consisting of C atoms linked by a network of covalent b ...
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Nanoparticle Suspension Preparation Using Ultrasonic Vibration

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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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