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history of the periodic table & periodic law and table layout
Transcript of history of the periodic table & periodic law and table layout
Periodic Law and Table Layout People that made it happen John Newlands had published his law of ovtaves in 1865. The law of Octaves had two elements in one box and did not allow space for undiscovered elements Lother Meyer published a Periodic table which described the placement of 28 elements. Alexandre-Emile Beguyer de Chancourtois was the first scientist to arrange the chemical elements in order of their atomic weights Dmitri ivanovich made the periodic table A "story" of its development A.E.Beguyer de Chancourtois was the first person to make use of atomic weights to reveal that the elements were arranged according to their atomic weights with similar elements occuring at regular intervals in 1862 John Newlands proposed the law of Octaves which stated that elements repeated their chemical properties ever eighth element in 1863 Meyers 1864 textbook included a abbreviated version of a periodic table used to classify about half of the known elements in 1868. How elements got their name Mendeleev predicted the existence and properties of unknown elements which he called eka-aluminum, eka-boron, and eka-silicon. The elements gallium, scandium and germanium were found later to fit his predictions quite well. some were named after people others were named after towns, universities, or laboratories where they were discovered. other elements were named after countries how and why elements where named
#110-118 Darmstadtium-named after the city Darstadt in Germany named after Wilhelm Roentgen, who was awarded the first ever Physics Nobel Prize in 1901 for his discovery of x-rays. named after Nicolaus Copernicus, who established that the earth orbits the sun. Temporary Name named after Russian physicist Georgy Flyorov Temporary name name was adopted by IUPAC on May 31, 2012 Temporary name Temporary name who came up with it and how? Came up with a way of organizing the elements that were known at the time He set them out in order of atomic weight, and then grouped them into rows and columns based on their chemical and physical properties. temporary name Mendeleev made the periodic table before the Schrödinger model, or the Rutherford model. He had no idea what atoms were made of or why they behaved as they did. Nevertheless, he was able to put together the periodic table almost as we know it today--except that some elements were missing, because they were unknown in 1869. He had no idea what atoms were made of or why they behaved as they did. Nevertheless, he was able to put together the periodic table almost as we know it today--except that some elements were missing, because they were unknown in 1869. Layout of table,groups, series, periods, and families The Periodic Law is the law stating that many of the physical and chemical properties of the elements tend to recur in a systematic manner with increasing atomic number. Progressing from the lightest to the heaviest atoms, certain properties of the elements approximate those of precursors at regular intervals of 2, 8, 18, and 32. The periodic table is a table of the chemical elements in which the elements are arranged by order of atomic number in such a way that the periodic properties (chemical periodicity) of the elements are made clear Elements in groups have some similar properties to each other. The table gets its name from the way it's organized. Periods are horizontal and we read the elements from left to right. Groups and Periods "categorize" the Periodic Table. Groups are the columns and Periods are the rows. The periodic table has 114 elements, 18 groups, and 7 periods. There are different kinds of elements like noble gases, precious metals,
Alkaline metals, etc... Each element has an atomic number and an atomic mass, located in its box. he atomic number indicates how many protons are in the nucleus The atomic mass is the number in atomic units and indicates the number of protons and neutrons in the nucleus.