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Mendeleev faced challenges when ordering the elements due to inconsistencies in atomic weights, which sometimes led to elements being placed out of order based on their properties. He also had to leave gaps for undiscovered elements, predicting their existence and properties, which was a bold step given the limited knowledge of the time. Additionally, he encountered issues with certain elements that did not fit neatly into his Periodic Table structure, prompting him to prioritize chemical properties over atomic weight in some cases.
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What describes why Mendeleev succeeded where others failed?
Mendeleev realized that some elements had not been discovered.
What did Dimtri Mendeleev did not know about the periodic table?
Only some elements were discovered during the life of Mendeleev.
What changes did Mendeleev make to ordering of the elements to make his ideas work?
Mendeleev arranged the elements in his periodic table primarily by increasing atomic mass rather than atomic number, which allowed him to group elements with similar chemical properties. He also left gaps for undiscovered elements, predicting their properties based on trends in the table. This approach enabled him to correct some atomic masses of known elements, leading to a more coherent arrangement that reflected periodicity. Mendeleev's willingness to deviate from strict mass order in favor of chemical properties was a key innovation in his formulation of the periodic law.
Which describes why Mendeleev succeeded where other failed?
He realized that some elements had not been discovered.
Did Mendeleev fix the problem of predicted where new elements would fit into the periodic table?
Yes, Dimitri Mendeleev did (accurately, I might add) predict where elements would appear in his table. He also correctly predicted some of the missing elements' properties, based on where they were positioned in his table.
What describes why Mendeleev succeeded where others failed?
Mendeleev realized that some elements had not been discovered.
What did Dimtri Mendeleev did not know about the periodic table?
Only some elements were discovered during the life of Mendeleev.
What changes did Mendeleev make to ordering of the elements to make his ideas work?
Mendeleev arranged the elements in his periodic table primarily by increasing atomic mass rather than atomic number, which allowed him to group elements with similar chemical properties. He also left gaps for undiscovered elements, predicting their properties based on trends in the table. This approach enabled him to correct some atomic masses of known elements, leading to a more coherent arrangement that reflected periodicity. Mendeleev's willingness to deviate from strict mass order in favor of chemical properties was a key innovation in his formulation of the periodic law.
Who arranged the first periodic table of elements?
some guy called Mendeleev
Which describes why Mendeleev succeeded where other failed?
He realized that some elements had not been discovered.
What led Mendeleev to predict some elements had not yet been discovered?
the large gaps
What was Mendeleev's contribution to the knowledge of elements?
When making his periodic table Mendeleev noticed some spaces where elements should be couldn't be filled. He didn't want to force elements that didn't belong there to go there, so he believed the spaces were undiscovered elements. He left the names blank but predicted their properties. Later the elements Mendeleev predicted existed were discovered.
Why did Dmitri Mendeleev leave some squares in his table blank?
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.
Did mendeleev group the elements by density?
No, Mendeleev grouped the elements by atomic mass and chemical properties to create the periodic table. While there may be some correlation between element density and position on the periodic table, density was not the primary factor Mendeleev used for organization.
Did Mendeleev fix the problem of predicted where new elements would fit into the periodic table?
Yes, Dimitri Mendeleev did (accurately, I might add) predict where elements would appear in his table. He also correctly predicted some of the missing elements' properties, based on where they were positioned in his table.
What did the Russian scientist Mendeleev create the periodic table?
Dmitri Mendeleev created the periodic table to organize and classify the known elements based on their properties and atomic weights. He left gaps for undiscovered elements and successfully predicted the properties of some of these missing elements.
Is mendeleev invented periodic table?
Yes, Dmitry Mendeleev is credited with creating the periodic table in 1869. He arranged the elements based on their properties and predicted the existence of some elements that were discovered later. His work laid the foundation for the modern periodic table.
