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Because at that time there were no known elements to fill those gaps. The fact that they were filled indicated the power of his classification method. When a scientific theory predicts things clearly and these are later found, the theory becomes validated.

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What was Dmitri Mendeleev first periodic table called?

Dmitri Mendeleev first periodic table is called Mendeleev's periodic table. Elements are arranged according to atomic mass.


What is the first element of the Mendeleev's periodic table?

The first element of the Mendeleev's periodic table is hydrogen (H).


What was the first periodic table?

Hydrogen is the first chemical element in the Periodic Table of Mendeleev.


What mendeleev's is known for?

Publishing the first Periodic Table.


Who is considered to be the father of the periodic table?

Dmitri Mendeleev is considered the father of the periodic table. He created the first widely accepted version of the periodic table in 1869, arranging elements based on their properties and atomic weights. Mendeleev's table laid the groundwork for the modern periodic table.


Why is Dimitri mendeleev important to the periodic table?

He made the first periodic table.


Why did Mendeleev leave three spaces on the periodic table?

Because those elements were not known when he formulated his periodic table.


Why did Dmitri Mendeleev leave spaces in the periodic table?

Because


Who organized the very first periodic table?

The first periodic table was organized by Dmitri Mendeleev in 1869. Mendeleev arranged elements according to their atomic weight and properties, leaving gaps for unknown elements that were later discovered.


Was carbon the first element on the periodic table?

The first element in the periodic table of Mendeleev is hydrogen, not carbon.


ASK Dmitri ivonovich mendeleyev.?

63 elements were in Dmitri Mendeleev's First periodic table 63 elements were in Dmitri Mendeleev's First periodic table


What was mendeleev the first to do?

=== ===Dmitri Mendeleev was a Russian chemist who formulated the periodic table.