Question

Which group of elements could be placed in Mendeleev's Periodic Table without disturbing the original order? Give a reason.

Answer 1

Hint: The periodic table, often known as the periodic table of (the) elements, is a table that shows the chemical elements in a tabular format. It's frequently used in chemistry, physics, and other disciplines, and it's considered a chemical icon. It is a visual representation of the periodic law, which asserts that the characteristics of chemical elements are related to their atomic numbers in a predictable manner.

Complete answer:
That individual is correctly recognised as the inventor of a specific scientific thought, since he or she recognises not only its philosophical, but also its actual aspect, and understands how to present the topic in such a way that everyone may be convinced of its reality. Then, like substance, the concept becomes indestructible. Mendeleev felt that some correlations he could uncover in his grand scheme of periodicity could not be found because some elements were yet unknown, and that these undiscovered elements would have characteristics that could be derived from the predicted interactions with other elements.
Mendeleev's Periodic Table might be filled with inert gases without disrupting the original arrangement. Even before Mendeleev, noble gases such as helium, neon, and argon had been mentioned by many scientists. But, much later than Mendeleev's discovery, these gases may be classed together as noble gases. Because these were the only known elements at the time, Mendeleev utilised 63 elements in his periodic table. He did, however, take the risk of leaving gaps in his periodic table. More elements would be discovered in the future, according to Lie's prediction. The Periodic Table of Mendeleev was the first effort to classify elements based on their chemical characteristics.
This is the primary explanation for the ease with which new elements may be added to Mendeleev's Periodic Table without disrupting the original sequence.
Hence noble gases are the correct answer.

Note:
Mendeleev's 1871 table allowed many more places for unknown elements than the scandium, gallium, and germanium forecasts that were shortly fulfilled, albeit he did not offer specific predictions of their characteristics. He predicted eighteen elements in all, but only half of them were ultimately found.