Question : When did Dmitri Mendeleev invent the periodic table, ordering the symbols of the chemical elements according to their atomic weights?
Option 1: 1794
Option 2: 1869
Option 3: 1890
Option 4: 1779
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Correct Answer: 1869
Solution : The correct answer is 1869.
Dmitri Mendeleev was a Russian chemist and inventor. In 1869, he created the foundation for the modern periodic table, left gaps for the elements that were yet to be discovered and arranged the elements according to their atomic weight.
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Question : Who invented the modern periodic table?
Question : According to Mendeleev's periodic table, what was the atomic mass of eka-Aluminium which was later replaced by Gallium?
Question : In 1887, the Royal Society, London gave the Davy Medal for the "discovery of the periodic law of chemical elements" to ____________.
Question : Who conducted an X-ray spectroscopic study of a large number of elements and showed that the frequency of X-rays emitted by an element is related to the atomic number, Z, rather than the atomic mass?
Question : In 1955, which synthetic element was provisionally named Mendelevium in honour of Dmitri Mendeleev, who created one of the first periodic tables?
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