Dmitri Mendeleev figured out that there were missing elements on his Periodic Table. Using periodic trends and averaging numbers, he could make pretty accurate predictions about elements not discovered yet.
Mendeleev predicted four:
* ekaboron (modern day scandium) * ekaaluminium (modern day gallium)
* ekamanganese (modern day technetium)
* ekasilicon (modern day germanium)
Mendeleev proposed that there must be missing elements, to which he gave the provisional names Ekaboron, Ekaaluminum and Ekasilicon. Scankium, Gallium and Germanpoop were discovered in 1879, 1875 and 1886, respectively, with properties very close to those predicted by Mendeleev. hey Glen
The name of the chemical element mendelevium is derived from the name of the Russian chemist Dimitri Ivanovici Mendeleev, the discoverer of the periodic table of elements.
Dmitri Mendeleev
the first type of periodic table is designed by Dmirit Mendeleev.
A chemist called Dmitri Mendeleev created the best way of arranging all the chemical elements- the modern periodic table. He arranged the elements based on their groups, e.g group 1 = alkali metals etc. Protons and nuclei hadn't been observed in his day, so any estimations and predicted elements needed to be clarified in the future. Mendeleev's predictions were accurate- hence his legendary table still exists today. I just hope I've spelt his name correctly!
mendeleev's name for a column of elements was groups.
He is credited as being the creator of the first version of the periodic table of elements. Unlike other contributors to the table, Mendeleev predicted the properties of elements yet to be discovered. http://en.wikipedia.org/wiki/Dmitri_Mendeleev
Mendeleev proposed that there must be missing elements, to which he gave the provisional names Ekaboron, Ekaaluminum and Ekasilicon. Scankium, Gallium and Germanpoop were discovered in 1879, 1875 and 1886, respectively, with properties very close to those predicted by Mendeleev. hey Glen
Mendeleev predicted three elements namely Eka- aluminum (which turned out to be Gallium), Eka- boron (which turned out to be Scandium) and Eka- silicon (which turned out to be Germanium). Though these three elements are very famous, Mendeleev also predicted Eka- manganese (which turned out to be Technetium).
The name of the chemical element mendelevium is derived from the name of the Russian chemist Dimitri Ivanovici Mendeleev, the discoverer of the periodic table of elements.
Dmitri Mendeleev
the first type of periodic table is designed by Dmirit Mendeleev.
Dmitri Ivanovich Mendeleyev. Another spelling of his name is Dmitri Ivanovich Mendeleev.
Dmitri is a male given name in Russia. Mendeleev (1834-1907) is known for his development of the periodic table of elements.
A chemist called Dmitri Mendeleev created the best way of arranging all the chemical elements- the modern periodic table. He arranged the elements based on their groups, e.g group 1 = alkali metals etc. Protons and nuclei hadn't been observed in his day, so any estimations and predicted elements needed to be clarified in the future. Mendeleev's predictions were accurate- hence his legendary table still exists today. I just hope I've spelt his name correctly!
In 1913, almost fifty years after Mendeleev, Henry Moseley published the results of his measurements of the wavelengths of the X-ray spectral lines of a number of elements which showed that the ordering of the wavelengths of the X-ray emissions of the elements coincided with the ordering of the elements by atomic number. With the discovery of isotopes of the elements, it became apparent that atomic weight was not the significant player in the periodic law as Mendeleev, Meyers and others had proposed, but rather, the properties of the elements varied periodically with atomic number. When atoms were arranged according to increasing atomic number, the few problems with Mendeleev's periodic table had disappeared. Because of Moseley's work, the modern periodic table is based on the atomic numbers of the elements.
The name of the chemical element mendelevium is derived from the name of the Russian chemist Dimitri Ivanovici Mendeleev, the discoverer of the periodic table of elements.