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2. File:Molecules and the molecular theory of matter (IA ...

   en.wikipedia.org/wiki/File:Molecules_and_the...

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3. History of molecular theory - Wikipedia

   en.wikipedia.org/wiki/History_of_molecular_theory

   In two papers outlining his "theory of atomicity of the elements" (1857–58), Friedrich August Kekulé was the first to offer a theory of how every atom in an organic molecule was bonded to every other atom. He proposed that carbon atoms were tetravalent, and could bond to themselves to form the carbon skeletons of organic molecules.

4. List of states of matter - Wikipedia

   en.wikipedia.org/wiki/List_of_states_of_matter

   Mesomorphic states: States of matter intermediate between solid and liquid. Plastic crystal: A molecular solid with long-range positional order but with constituent molecules retaining rotational freedom. Liquid crystal: Properties intermediate between liquids and crystals. Generally, able to flow like a liquid but exhibiting long-range ...

5. Valence bond theory - Wikipedia

   en.wikipedia.org/wiki/Valence_bond_theory

   In chemistry, valence bond (VB) theory is one of the two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods of quantum mechanics to explain chemical bonding. It focuses on how the atomic orbitals of the dissociated atoms combine to give individual chemical bonds when a molecule is formed.

6. File:The corpuscular theory of matter (IA ...

   en.wikipedia.org/wiki/File:The_corpuscular...

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7. Über die von der molekularkinetischen Theorie der Wärme ...

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   "Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen" (English: "On the movement of small particles suspended in a stationary liquid demanded by the molecular-kinetic theory of heat") is the 1905 journal article, by Albert Einstein, that proved the reality of atoms, the modern understanding of which had been ...