Mendelejeff, Zeitschrift für Chemie 12, 405-406 (1869) translation by Carmen Giuntaīy ordering the elements according to increasing atomic weight in vertical rows so that the horizontal rows contain analogous elements, still ordered by increasing atomic weight, one obtains the following arrangement, from which a few general conclusions may be derived. On the Relationship of the Properties of the Elements to their Atomic Weights D. An English translation of that German abstract is presented here. The German abstract was the vehicle by which Mendeleev's ideas reached chemists working in Western Europe. That same year, a German abstract of the paper, consisting of the table and eight comments, was published in Zeitschrift für Chemie. ) The paper was published in the first volume of the new society's journal. (Actually, Mendeleev was ill, and his colleague Nikolai Menshutkin presented his paper. This table and the accompanying observations were first presented to the Russian Chemical Society in March 1869. As noted below, Mendeleev himself corrected some of the errors within a few years others persisted well into the 20 th century. Scientists, even great scientists, trying to see further than others have in the past, do not always see the whole picture clearly. Mendeleev's formulation was clearly superior in several respects to the work of contemporary classifiers: it was the clearest, most consistent, and most systematic formulation, and Mendeleev made several testable predictions based on it. Mendeleev was one of a number of independent discoverers of the periodic law in the 1860s-that number ranging from one to six depending on the criteria one adopts. His chief contribution to chemistry was the establishment of the periodic system of elements. Show Electronic configuration of Iron.Mendeleev's First Periodic Table Elements and Atoms: Chapter 12ĭmitrii Mendeleev (1834-1907 see portrait of Mendeleev in 1878 by Kramskoy) was born in Tobolsk, in Western Siberia. To make bridge, stadium, skyscrapers, aircraftsĥ) It is mainly use for making surgical instruments and industrial equipmentħ) It is use to making electrical equipment and making utensils and for making machineryĨ) It is use in ship building ,pipeline mining, washing machine It is easily react with oxygen in air and form iron oxide ( rust)ġ) It is use to making car tools, bicycle, two wheelerĢ) It is important component in photosynthesis process 3) Iron use in gas industriesĤ) It is use in construction. In iron 2 electron present in K shell, 8 electrons present in L shell, 14 electron present in M shell and 2 electron present in N.shellģ) Valency : iron show valency 2,3,4,6 In iron maximum 6 electron present in outer shellĤ) Atomic radius : atomic radius of iron is 156 pmĥ) Reactivity : it is highly reactive element. ĥ9 Fe and 55Fe this radio active isotope is use to study red blood cellsĮlectronic configuration of iron is 1S 2 2S 2 2P 6 3S 2 3P 6 3d 6 4S 2Įlectronic configuration of iron is 2,8,14,2 Name is ‘ iren’ġ) Atomic symbol: atomic symbol of iron is FeĢ) Atomic number: iron show atomic number 26 In iron 26 proton and 26 electron is presentģ) Atomic weight/ mass: atomic weight of iron is 55.84 approximately 56 amu ( atomic mass unit) In iron 26 proton and 30 neutron is presentĤ) Position : iron is place in periodic table at 4 row( period) and 8 column ( group) It is 8 group elementĦ) Colour : It is greyish in colour It is shiny easily rust in air 8) Odour : it is odourless metalġ0) Boiling point : boiling point of iron 2861 Cġ1) Melting point : melting point of iron 1538 Cĥ4 Fe : atomic weight of this isotope is 53.9 Amu In this isotope 26 proton, 26 electron and 29 neutron It is present in 5.8%ĥ6 Fe: atomic weight of this isotope 55.9 Amu In this isotope 26 proton, 26 electron, and 30 neutron It is present in 91.75%ĥ7Fe: atomic weight of this isotope is 56.9 Amu In this isotope 26 proton, 26 electron and 31 neutron is present It is present 2.1 %ĥ8Fe: atomic weight of this isotope is 57.9 Amu In this isotope of 26 proton ,26 electron and 32 neutron is present It is present in 0.28% Iron have six radio active isotopes. In our body iron is important for haemoglobin to the circulation of oxygen at each and every body part Liver ,kidney, brewers yeast ,coca and liquorice are contain haemoglobinĭiscovery : iron is present on earth surface from ancient. Iron is easily available and cost is cheap. Iron is 6th number element in transition metal series. Atomic Mass, Number, Physical, Chemical properties, Electronic configuration, Valency, Chemical reaction, Uses Iron – Learn all details regarding Iron in Periodic Table i.e.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |