mandeleev didn't know spaces in the Periodic Table because he doesn't arrange it john Kepler arrange it most of mendeleev discoveries of elements are few most of other element where discover by other scientist after him in 19th century
Mendeleev left spaces for undiscovered elements. He named them eka-aluminium, eka-silicon etc.
Mendeleev left out the noble gases (Group 18) from his periodic table because they were not discovered yet at the time he developed the table. These elements were later added to the periodic table as they were discovered.
Dmitri Mendeleev left blank spaces on the periodic table to account for elements that had not been discovered yet. He predicted the existence and properties of these missing elements based on the patterns and trends of the known elements in the table. This allowed for the successful prediction of the characteristics of elements like gallium and germanium.
Dmitri Mendeleev left gaps in the periodic table to account for elements that had not been discovered yet. He predicted the properties of these missing elements based on the patterns he observed among known elements. This led to the successful discovery of new elements that filled in the empty spaces, validating his periodic table.
There is no specific reason mentioned for why Dmitri Mendeleev left blank spaces on the periodic table. It is believed that he left these spaces to accommodate elements that were yet to be discovered or to demonstrate the existence of elements with certain properties that were predicted but not yet confirmed. These blank spaces eventually led to the discovery of new elements and validated Mendeleev's periodic table.
Because
Because those elements were not known when he formulated his periodic table.
Gallium, Silicon and Aluminum , -Peter
There were 3 blank spaces in mendeleev's Periodic Table. He left it for the elements which were not discovered at that time.
Mendeleev left blank spaces because certain elements on the Periodic Table were not known at that time. He knew that in the future, those elements would be found and placed on the periodic table.
Mendeleev left gaps for eight elements in his periodic table that were yet to be discovered. These gaps eventually corresponded to the elements gallium, germanium, scandium, technetium, francium, and technetium.
Mendeleev left spaces for undiscovered elements. He named them eka-aluminium, eka-silicon etc.
Mendeleev left blank spaces in his periodic table to account for elements that had not yet been discovered. He predicted the properties of these missing elements based on the patterns he observed in the table. This empty spaces allowed for the periodic table to be a predictive tool for the discovery of new elements.
Mendeleev's periodic table was similar to the modern periodic table in that both are organized by increasing atomic number and have elements grouped according to similar chemical properties. Additionally, both tables have blank spaces where undiscovered elements were predicted to exist.
Mendeleev's published the periodic table in 1869.
Mendeleev thought about the future and realized that it was entirely unlikely that all earthly elements had been discovered, so he left blank spaces in his table and even predicted some of the elements that would fit in those spaces. Surprisingly enough, as time passed, chemists began discovering many of the elements that he had predicted, which fit perfectly into his periodic table.
Mendeleev left out the noble gases (Group 18) from his periodic table because they were not discovered yet at the time he developed the table. These elements were later added to the periodic table as they were discovered.