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| | Dmitrii Mendeleev |
 | | When, in 1871, I described to the Russian Chemical Society the properties, clearly defined by the periodic law, which such elements ought to possess, I never hoped that I should live to mention their discovery to the Chemical Society of Great Britain as a confirmation of the exactitude and the generality of the periodic law. | | | Before the promulgation of this law the chemical elements were mere fragmentary, incidental facts in Nature; there was no special reason to expect the discovery of new elements, and the new ones which were discovered from time to time appeared to be possessed of quite novel properties. | | | A third circumstance which revealed the periodicity of chemical elements was the accumulation, by the end of the sixties, of new information respecting the rare elements, disclosing their many-sided relations to the other elements and to each other. |
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http://webserver.lemoyne.edu/faculty/giunta/mendel.html
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| | Education World® - *Science : Chemistry : Periodic Table of Elements : General Resources |
| | Chemical Elements.com Offers an interactive Periodic Table of the Elements that users can customize to show specific data about the elements including discovery dates. | | | ChemiCool US Chemical Elements and their Symbols at The Learning Group US Chemical Elements.com Interactive table of elements provides data on all of the known elements, their atomic number and mass, and electron configuration. | | | ChemicalElements.com: Online Periodic Table Provides information on the 109 named elements plus elements 110 112. |
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http://db.education-world.com/perl/browse?cat_id=2924&url_start=26&cat_start=1
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| | Periodic table -- Facts, Info, and Encyclopedia article |
| | First created by (Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements (1834-1907)) Dmitri Mendeleev, the elements are arranged by (An elementary particle with negative charge) electron structure so that many (additional info and facts about chemical properties) chemical properties vary regularly across the table. | | | The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known (Any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter) chemical elements. | | | However, Mendeleev plotted a few elements out of strict mass sequence in order to make a better match to the properties of their neighbours in the table, corrected mistakes in the values of several atomic masses, and predicted the existence and properties of a few new elements in the empty cells of his table. |
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http://www.absoluteastronomy.com/encyclopedia/p/pe/periodic_table.htm
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| | Education World® - *Science : Chemistry : Periodic Table of Elements : General Resources |
| | Chemical Elements.com Offers an interactive Periodic Table of the Elements that users can customize to show specific data about the elements including discovery dates. | | | ChemiCool US Chemical Elements and their Symbols at The Learning Group US Chemical Elements.com Interactive table of elements provides data on all of the known elements, their atomic number and mass, and electron configuration. | | | ChemicalElements.com: Online Periodic Table Provides information on the 109 named elements plus elements 110 112. |
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http://db.education-world.com/perl/browse?cat_id=2924&url_start=26&cat_start=1
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| | Nobel Prize in Chemistry 1911 - Presentation Speech |
| | by the discovery of the chemical elements radium and polonium; | | | The discovery of radium and polonium, an even more radioactive element, has brought in its train the discovery of a great many other radioactive elements with longer or shorter life-spans, by which our field of knowledge in chemistry and our understanding concerning the nature of matter have been considerably extended. | | | The theory of the absolute immutability of chemical elements no longer holds good, now that science has succeeded in penetrating some of the mystery which has until now shrouded the evolution of the elements. |
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http://nobelprize.org/chemistry/laureates/1911/press.html
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| | Links - Elementymology & Elements Multidict |
| | Dave Trapp, Discovery and Naming of Chemical Elements, "an effort to present the history of the discovery of the chemical elements and the origins of their names in a way that is both useful and interesting". | | | Useful Chem Sites This site maps the periodic table with a focus on the history of the names of elements. | | | Periodic Table of the Elements (not really Dutch, but it gives at least the Dutch names) |
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http://www.vanderkrogt.net/elements/pertablinks.html
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| | Links - Elementymology & Elements Multidict |
| | Dave Trapp, Discovery and Naming of Chemical Elements, "an effort to present the history of the discovery of the chemical elements and the origins of their names in a way that is both useful and interesting". | | | Useful Chem Sites This site maps the periodic table with a focus on the history of the names of elements. | | | Periodic Table of the Elements (not really Dutch, but it gives at least the Dutch names) |
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http://www.vanderkrogt.net/elements/pertablinks.html
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| | Periodic table - Open Encyclopedia |
| | The periodic table of the chemical elements is a tabular display of the known chemical elements. | | | Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late 19th and early 20th century. | | | The elements are arranged by electron structure so that many chemical properties vary regularly across the table. |
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http://open-encyclopedia.com/Periodic_table
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| | Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations |
| | Energy Citations Database (ECD) Document #7333665 - Criteria for the discovery of chemical elements | | | 652021 -- Nuclear Properties & Reactions, A=220 & above, Experimental-- Mass, Abundance,& Binding Energy-- (-1987); ;TRANS 104 ELEMENTS-- NATURAL OCCURRENCE;TRANS 104 ELEMENTS-- SYNTHESIS; ALPHA DECAY;ATOMIC NUMBER;COINCIDENCE METHODS;QUALITATIVE CHEMICAL ANALYSIS;RECOMMENDATIONS;X RADIATION | | | CHEMICAL ANALYSIS;COUNTING TECHNIQUES;DECAY;ELECTROMAGNETIC RADIATION;ELEMENTS;IONIZING RADIATIONS;PARTICLE DECAY;RADIATIONS;TRANSPLUTONIUM ELEMENTS;TRANSURANIUM ELEMENTS |
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http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=7333665
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| | History of the Origin of the Chemical Elements and Their Discoverers |
| | Elements exist where the accepted name was proposed on the basis of an erroneous discovery of that element but widespread usage has dictated the continued use of the original name, even after the error has been discovered (see nobelium in the element list). | | | The method of discovery of the chemical elements in the late eighteenth and the early nineteenth centuries used the properties of the new substances, their separability, the colors of their compounds, the shapes of their crystals and their reactivity to determine the existence of new elements. | | | It is the eighth element in the Actinide series of the elements and was named in analogy with Terbium (for Ytterby the town in Sweden whose mine produced the ore), which is the eighth element in the Lanthanide series of the elements. |
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http://www.nndc.bnl.gov/content/elements.html
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| | History of the Origin of the Chemical Elements and Their Discoverers |
| | The method of discovery of the chemical elements in the late eighteenth and the early nineteenth centuries used the properties of the new substances, their separability, the colors of their compounds, the shapes of their crystals and their reactivity to determine the existence of new elements. | | | Elements exist where the accepted name was proposed on the basis of an erroneous discovery of that element but widespread usage has dictated the continued use of the original name, even after the error has been discovered (see nobelium in the element list). | | | It is the eighth element in the Actinide series of the elements and was named in analogy with Terbium (for Ytterby the town in Sweden whose mine produced the ore), which is the eighth element in the Lanthanide series of the elements. |
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http://www.nndc.bnl.gov/content/elements.html
(11235 words)
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| | Discovery and Naming of Chemical Elements |
| | What follows is an effort to present the history of the discovery of the chemical elements and the origins of their names in a way that is both useful and interesting. | | | has an extensive etymology of the names of the chemical elements, their names in 68 languages, and some photographs at www.vanderkrogt.net/elements. | | | Origin of the Names of Chemical Elements, Journal of Chemical Education, 66: 9, September 1989. |
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http://homepage.mac.com/dtrapp/Elements/elements.html
(11235 words)
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| | Discovery and Naming of Chemical Elements |
| | What follows is an effort to present the history of the discovery of the chemical elements and the origins of their names in a way that is both useful and interesting. | | | has an extensive etymology of the names of the chemical elements, their names in 68 languages, and some photographs at www.vanderkrogt.net/elements. | | | Origin of the Names of Chemical Elements, Journal of Chemical Education, 66: 9, September 1989. |
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http://homepage.mac.com/dtrapp/Elements/elements.html
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| | NodeWorks - Encyclopedia: Periodic table |
| | Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late 19th and early 20th century. | | | The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known chemical elements. | | | However, Mendeleev plotted a few elements out of strict mass sequence in order to make a better match to the properties of their neighbours in the table, corrected mistakes in the values of several atomic masses, and predicted the existence and properties of a few new elements in the empty cells of his table. |
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http://pedia.nodeworks.com/P/PE/PER/Periodic_table
(848 words)
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| | The Elements: Introduction |
| | The Elements also represent the stages in various processes of growth and transformation (embodied, for example, in the alchemical Rotation of the Elements), such as the stages in the Ascent of the Soul in Chaldean Theurgy (Divine Invocation), also discussed later. | | | The discovery of the Four Elements is generally credited to Empedocles, a fifth century BCE Greek from Sicily. | | | The elemental signs of Earth and Water have in common the pubic triangle, because these Elements are traditionally feminine and more passive, since they have in common the contracting, uniting Cool Power (see below on Coolness); the downward triangle also shows these elements are descending (Water and Earth fall). |
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http://www.cs.utk.edu/~mclennan/OM/BA/AGEDE/Intro.html
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| | Space Studies Board |
| | What transformations were undergone by the biogenic elements and their compounds during this process remain poorly understood, as are the ways in which the physical and chemical properties of these elements and their compounds may have influenced the course of events during the formation of the solar system. | | | To assess the role of biogenic elements in influencing specific geophysical and geochemical processes that established, maintained, and altered physical-chemical conditions in these regions over time. | | | It begins with the synthesis in stars of the biogenic elements—the elements that make up all life—and their ejection into the interstellar medium; it ends with the distribution of these elements and their compounds throughout our solar system within the planetoids, which became building blocks of planets. |
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http://www7.nationalacademies.org/ssb/21lsch2.html
(1994 words)
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| | Periodic table - Wikipedia, the free encyclopedia |
| | The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known chemical elements. | | | Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late 19th and early 20th century. | | | A group is a vertical column in the periodic table of the elements. |
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http://en.wikipedia.org/wiki/Periodic_table
(1994 words)
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| | Periodic table - Wikipedia, the free encyclopedia |
| | The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev. | | | The main value of the periodic table is the ability to predict the chemical properties of an element based on its position in the table. | | | A period is a horizontal row in the periodic table of the elements. |
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http://en.wikipedia.org/wiki/Periodic_table
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| | Periodic table - Wikipedia, the free encyclopedia |
| | The original table was created before the discovery of subatomic particles or the formulation of current quantum mechanical theories of atomic structure. | | | A period is a horizontal row in the periodic table of the elements. | | | The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev. |
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http://en.wikipedia.org/wiki/Periodic_table
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| | Discovery of pattern of chemical elements |
| | This discovery is the pattern of the abundance of the elements. | | | The periodic table of elements describes the chemical pattern of the elements. | | | The first thirty elements are grouped together, the second group of thirty elements, that is from 31 to 60 are grouped together, the third group of thirty elements, that is from 61 to 90, are grouped together. |
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http://www.expertclick.com/NewsReleaseWire/default.cfm?Action=ReleaseDetail&ID=8523
(2082 words)
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| | Periodic table - Wikipedia, the free encyclopedia |
| | The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev. | | | A period is a horizontal row in the periodic table of the elements. | | | The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize and compare all the many different forms of chemical behaviour. |
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http://en.wikipedia.org/wiki/Periodic_table
(2089 words)
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| | The Periodic Table |
| | A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. | | | If a periodic table is regarded as an ordering of the chemical elements demonstrating the periodicity of chemical and physical properties, credit for the first periodic table (published in 1862) probably should be given to a French geologist, A.E.Beguyer de Chancourtois. | | | Although Mendeleev's table demonstrated the periodic nature of the elements, it remained for the discoveries of scientists of the 20th Century to explain why the properties of the elements recur periodically. |
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http://www.wou.edu/las/physci/ch412/perhist.htm
(1833 words)
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| | The Periodic Table |
| | A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. | | | Although Mendeleev's table demonstrated the periodic nature of the elements, it remained for the discoveries of scientists of the 20th Century to explain why the properties of the elements recur periodically. | | | If a periodic table is regarded as an ordering of the chemical elements demonstrating the periodicity of chemical and physical properties, credit for the first periodic table (published in 1862) probably should be given to a French geologist, A.E.Beguyer de Chancourtois. |
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http://www.wou.edu/las/physci/ch412/perhist.htm
(1833 words)
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| | chem el |
| | The Chemical Elements the discovery and origin of their names | | | The Elements Flash animation of satirist Tom Lehrer's song "The Elements". | | | Periodic Table of Elements from Chemical and Engineering News |
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http://wolves.dsc.k12.ar.us/highschool/media/chem_el.htm
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| | The Periodic Table |
| | A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. | | | If a periodic table is regarded as an ordering of the chemical elements demonstrating the periodicity of chemical and physical properties, credit for the first periodic table (published in 1862) probably should be given to a French geologist, A.E.Beguyer de Chancourtois. | | | Although Mendeleev's table demonstrated the periodic nature of the elements, it remained for the discoveries of scientists of the 20th Century to explain why the properties of the elements recur periodically. |
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http://www.wou.edu/las/physci/ch412/perhist.htm
(1833 words)
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| | The Periodic Table |
| | A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. | | | Although Mendeleev's table demonstrated the periodic nature of the elements, it remained for the discoveries of scientists of the 20th Century to explain why the properties of the elements recur periodically. | | | If a periodic table is regarded as an ordering of the chemical elements demonstrating the periodicity of chemical and physical properties, credit for the first periodic table (published in 1862) probably should be given to a French geologist, A.E.Beguyer de Chancourtois. |
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http://www.wou.edu/las/physci/ch412/perhist.htm
(1833 words)
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| | Mendeleev's later reflections |
| | When, in 1871, I described to the Russian Chemical Society the properties, clearly defined by the periodic law, which such elements ought to possess, I never hoped that I should live to mention their discovery to the Chemical Society of Great Britain as a confirmation of the exactitude and the generality of the periodic law. | | | Pelopidas, in 1883, made a communication to the Russian Chemical and Physical Society on the periodicity of the hydrocarbon radicles, pointing out the remarkable parallelism which was to be noticed in the change of properties of hydrocarbon radicles and elements when classed in groups. | | | Mendeleev's first publication on the periodic system was in the first volume of the new Russian Chemical Society's journal in 1869. |
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http://web.lemoyne.edu/~giunta/EA/MENDELann.HTML
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| | MSN Encarta - Glenn Seaborg |
| | Seaborg, Glenn Theodore (1912-1999), American chemist and Nobel laureate, known for his discovery of new chemical elements. | | | He is known particularly for his discovery and characterization of many radioactive isotopes (see Isotope) and for his share in the discovery of such elements as plutonium, americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, and nobelium. | | | In 1997 the International Union of Pure and Applied Chemistry announced that the chemical element with atomic number 106 would be given the name seaborgium (Sg) in his honor. |
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http://encarta.msn.com/encyclopedia_761552385/Glenn_Seaborg.html
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| | Seaborg Center> The Life of Glenn Seaborg |
| | But Seaborg persisted, and his insights led to correct predictions of the chemical properties of the transuranium elements that, in turn, enabled the discovery and separation of new elements. | | | When Glenn Seaborg arrived at Berkeley, the heaviest known chemical element was uranium (atomic number 92), but in the late 1930s and early 1940s, vigorous searches were under way to discover heavier elements. | | | For all his discoveries in the laboratory, however, Glenn Seaborg resolutely insisted that his greatest discovery of all was made in 1941 in the office of Ernest Lawrence where Seaborg first met Lawrence's secretary, Helen Griggs. |
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http://seaborg.nmu.edu/gts
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