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∙ 12y agomandeleev 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
Edwin Mitchell
Mendeleev left spaces in his Periodic Table based on the patterns he observed in the chemical properties of known elements. He used these gaps to predict the existence and properties of undiscovered elements that would fill those spots. This foresight helped demonstrate the periodicity of elements and led to the discovery of new elements that matched his predictions.
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∙ 12y agomandeleev 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
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∙ 11y agoBecause of the periodicity shown by the table Mendeleev knew that new elements would be found to fill in these blank spaces in his nascent table. His predictions were born out fully as element after element was found to fill these empty spaces.
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∙ 9y agoMendeleev thought it simply meant that the elements which belonged in the gaps had not yet been discovered. He was also able to work out the Atomic Mass of the missing elements, and so predict their properties.
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∙ 10y agoMendeleev arranged the elements in order of increasing related atomic mass
Because germanium was not known at the time when Mendeleev formulated his periodic table.
Mendeleev left spaces for undiscovered elements. He named them eka-aluminium, eka-silicon etc.
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.
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.
K
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.
Because germanium was not known at the time when Mendeleev formulated his periodic table.
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 decision to leave blank spaces on his table accurately predicted the existence and properties of undiscovered elements, demonstrating the periodicity of the elements. This foresight laid the foundation for the discovery of elements such as gallium, germanium, and scandium, validating his periodic table and contributing significantly to the organization of elements.
Mendeleev's published the periodic table in 1869.