find the co-relation of the following ekaboran :--------::eka aluminium :gallium
Answers
Answer:
Explanation:
Dmitri Mendeleev published a periodic table of the chemical elements in 1869 based on properties that appeared with some regularity as he laid out the elements from lightest to heaviest.[1] When Mendeleev proposed his periodic table, he noted gaps in the table and predicted that then-unknown elements existed with properties appropriate to fill those gaps. He named them eka-boron, eka-aluminium and eka-silicon, with respective atomic masses of 44, 68, and 72.
The four predicted elements lighter than the rare-earth elements, eka-boron (Eb, under boron, B, 5), eka-aluminium (Ea or El,[2] under Al, 13), eka-manganese (Em, under Mn, 25), and eka-silicon (Es, under Si, 14), proved to be good predictors of the properties of scandium (Sc, 21), gallium (Ga, 31), technetium (Tc, 43), and germanium (Ge, 32) respectively, each of which fill the spot in the periodic table assigned by Mendeleev.
The names were written by Dmitriy Mendeleev as экаборъ (ekabor"), экаалюминій (ekaalǔminij), экамарганецъ (ekamarganĕc"), and экасилицій (ekasilicij) respectively, following the pre-1917 Russian orthography.
Initial versions of the periodic table did not distinguish rare earth elements from transition elements, helping to explain both why Mendeleev's predictions for heavier unknown elements did not fare as well as those for the lighter ones and why they are not as well known or documented.
Scandium oxide was isolated in late 1879 by Lars Fredrick Nilson; Per Teodor Cleve recognized the correspondence and notified Mendeleev late in that year. Mendeleev had predicted an atomic mass of 44 for ekaboron in 1871, while scandium has an atomic mass of 44.955908.
In 1871, Mendeleev predicted[2] the existence of a yet-undiscovered element he named eka-aluminium (because of its proximity to aluminium in the periodic table). The table below compares the qualities of the element predicted by Mendeleev with actual characteristics of gallium (discovered in 1875 by Paul Emile Lecoq de Boisbaudran).
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Answer:
Ekaboron: Scandium::Ekaaluminium:gallium
CORRELATION::::::::::::::
As, Ekaboron and Ekaaluminium are the elements which are unknown at Mendeleev time,so mendeleev name them by adding eka
and make their properties..
Scandium and Gallium are the elements which are named later but same as mendeleevs elements and they take place of Eka.
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