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(N/A) Scientist and CountryYear and Contribution$1$. Johann Dobereiner (Chemist),German$1829$. Law of Triads: He noted a similarity among the physical

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(N/A) Scientist and CountryYear and Contribution$1$. Johann Dobereiner (Chemist),German$1829$. Law of Triads: He noted a similarity among the physical and chemical properties of groups of three elements (triads). The atomic weight of the middle element was approximately the average of the other two.$2$. $A.E.B.$ de Chancourtois (Geologist),French$1862$. Telluric Helix: He arranged known elements in order of increasing atomic weights on a cylindrical table to display the periodic recurrence of properties.$3$. John Alexander Newlands (Chemist),English$1865$. Law of Octaves: He arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to the first.$4$. Dmitri Mendeleev (Chemist),Russian$1869$. Periodic Law: "The properties of the elements are a periodic function of their atomic weights." He created the first comprehensive periodic table.$5$. Lothar Meyer (Chemist),German$1868$. Atomic Volume Curve: He plotted physical properties like atomic volume against atomic weight,showing a periodically repeated pattern.$6$. Henry Moseley (Physicist),English$1913$. Modern Periodic Law: He observed that the square root of $X$-ray frequency $(\sqrt{
u})$ plotted against atomic number $(Z)$ gives a straight line. He stated: "The physical and chemical properties of elements are periodic functions of their atomic number."

Briefly describe the contributions of various scientists to the development of the Periodic Table.

Similar Questions

Which of the following information was not known at the time when Mendeleev's periodic table was constructed?

Explain the "Law of Triads" with examples.

Which of the following is a Dobereiner's triad?

What is the fundamental difference between Mendeleev's periodic law and the modern periodic law?

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Scientist and Country	Year and Contribution
$1$. Johann Dobereiner (Chemist),German	$1829$. Law of Triads: He noted a similarity among the physical and chemical properties of groups of three elements (triads). The atomic weight of the middle element was approximately the average of the other two.
$2$. $A.E.B.$ de Chancourtois (Geologist),French	$1862$. Telluric Helix: He arranged known elements in order of increasing atomic weights on a cylindrical table to display the periodic recurrence of properties.
$3$. John Alexander Newlands (Chemist),English	$1865$. Law of Octaves: He arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to the first.
$4$. Dmitri Mendeleev (Chemist),Russian	$1869$. Periodic Law: "The properties of the elements are a periodic function of their atomic weights." He created the first comprehensive periodic table.
$5$. Lothar Meyer (Chemist),German	$1868$. Atomic Volume Curve: He plotted physical properties like atomic volume against atomic weight,showing a periodically repeated pattern.
$6$. Henry Moseley (Physicist),English	$1913$. Modern Periodic Law: He observed that the square root of $X$-ray frequency $(\sqrt{\nu})$ plotted against atomic number $(Z)$ gives a straight line. He stated: "The physical and chemical properties of elements are periodic functions of their atomic number."