In which method did Dmitri Mendeleev organize the elements?
Features of Mendeleev’s tables
Mendeleev arranged the elements in order of increasing relative atomic mass . When he did this he noted that the chemical properties of the elements and their compounds showed a periodic trend .
Which two elements did Mendeleev predict?
Soon, Mendeleev was predicting the properties of three elements – gallium, scandium and germanium – that had not then been discovered. So convinced was he of the soundness of his periodic law that he left gaps for these elements in his table.
How did Mendeleev predict the properties of germanium?
Discovery of Germanium
Germanium was one of the elements whose existence was predicted in 1869 by Russian chemist Dmitri Mendeleev, after he noticed a gap between silicon and tin in his periodic table. … Mendeleev had predicted the new element’s density would be 5.5 g/cm3 and its atomic weight would be 70.
What does Eka mean?
Eka in Sanskrit is used to define the number one. … He named it as Eka means next because he believed that the elements will be similar to aluminium, boron, and silicon. The Eka-aluminium was invented as Gallium, Eka-boron was invented as Scandium, and Eka-silicon was invented as germanium.
Did Mendeleev know about lanthanides?
How they came to be placed there is a long story; as we will see, Mendeleev did not know where to put them. The lanthanides are often referred to as the rare earth elements. This is an unfortunate misnomer (but so well embedded that we just have to accept it).
What was wrong with Mendeleev’s periodic table?
In devising his table, Mendeleev did not conform completely to the order of atomic mass. He swapped some elements around. (We now know that the elements in the periodic table are not all in atomic mass order.)
Why was Mendeleev’s periodic table accepted?
Both Mendeleev and Newland arranged the elements in order of relative atomic mass. Mendeleev left gaps so that elements with similar properties could be placed together. Mendeleev’s periodic table was accepted because elements with properties predicted by Mendeleev were discovered, filling the gaps in his table.
What are 3 uses for germanium?
Some people use germanium for osteoarthritis, rheumatoid arthritis (RA), pain, weak bones (osteoporosis), low energy, and AIDS. Other uses include heavy metal poisoning, including mercury and cadmium poisoning; depression; cancer; food allergies; and yeast and viral infections.
Where are the most massive elements on the periodic table?
But the most massive elements of all at the very high end of the periodic table — including platinum, gold, radon, and even uranium — owe their origins to an even rarer, more energetic process. The heaviest elements of all come from merging neutron stars, a fact that was long suspected but only confirmed in 2017.