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in chemical forms

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  • Chemical substance — Chemical redirects here. For other uses, see Chemical (disambiguation). Steam and liquid water are two different forms of the same chemical substance, water. In chemistry, a chemical substance is a form of matter that has constant chemical… …   Wikipedia

  • Chemical biology — is a scientific discipline spanning the fields of chemistry and biology that involves the application of chemical techniques and tools, often compounds produced through synthetic chemistry, to the study and manipulation of biological systems.… …   Wikipedia

  • Chemical weapon — Chemical weapons Pallets of 155 mm artillery shells containing HD (distilled sulfur mustard agent) at Pueblo Depot Activity (PUDA) chemical weapons storage facility. Blister Agents: (Vesicants) …   Wikipedia

  • Chemical energy — is the potential of a chemical substance to undergo a transformation through a chemical reaction or, to transform other chemical substances. Breaking or making of chemical bonds involves energy, which may be either absorbed or evolved from a… …   Wikipedia

  • Chemical beam epitaxy — (CBE) forms an important class of deposition techniques for semiconductor layer systems, especially III V semiconductor systems. This form of epitaxial growth is performed in an ultrahigh vacuum system. The reactants are in the form of molecular… …   Wikipedia

  • Chemical weapon designation — Chemical, biological, and radiological warfare agents are sometimes assigned what is termed a military symbol. Military symbols evolved out of the First World War from the British in part for secrecy, and to simplify reference to chemicals by… …   Wikipedia

  • chemical association — ▪ chemical bonding       the aggregation of atoms (atom) or molecules (molecule) into larger units held together by forces weaker than chemical bonds that bind atoms in molecules. The term is usually restricted to the formation of aggregates of… …   Universalium

  • chemical compound — Introduction  any substance composed of identical molecules consisting of atoms (atom) of two or more chemical elements (chemical element).       All the matter in the universe is composed of the atoms of more than 100 different chemical elements …   Universalium

  • chemical element — Introduction also called  element,         any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.       This article considers the… …   Universalium

  • chemical industry — Introduction       complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives.       Although the chemical industry may be described simply as the industry that uses chemistry and… …   Universalium

  • Chemical element — The periodic table of the chemical elements A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus.[1] Familiar examples of …   Wikipedia

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