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(N/A) ScientistContribution$1$. Johann DobereinerProposed the $Law \ of \ Triads$ $(1829)$,stating that the atomic weight of the middle element is app

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(N/A) ScientistContribution$1$. Johann DobereinerProposed the $Law \ of \ Triads$ $(1829)$,stating that the atomic weight of the middle element is approximately the average of the other two.$2$. $A.E.B.$ de ChancourtoisProposed the $Telluric \ Helix$ $(1862)$,a cylindrical arrangement of elements based on increasing atomic weights.$3$. John NewlandsProposed the $Law \ of \ Octaves$ $(1865)$,observing that every eighth element has properties similar to the first.$4$. Dmitri MendeleevFormulated the $Periodic \ Law$ $(1869)$,stating that properties of elements are a periodic function of their atomic weights.$5$. Lothar MeyerPlotted physical properties like atomic volume against atomic weight,showing a periodic pattern $(1868)$.$6$. Henry MoseleyEstablished the $Modern \ Periodic \ Law$ $(1913)$ by showing that properties are a periodic function of atomic number $(Z)$.

Write a note on the genesis of the periodic table.

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Scientist	Contribution
$1$. Johann Dobereiner	Proposed the $Law \ of \ Triads$ $(1829)$,stating that the atomic weight of the middle element is approximately the average of the other two.
$2$. $A.E.B.$ de Chancourtois	Proposed the $Telluric \ Helix$ $(1862)$,a cylindrical arrangement of elements based on increasing atomic weights.
$3$. John Newlands	Proposed the $Law \ of \ Octaves$ $(1865)$,observing that every eighth element has properties similar to the first.
$4$. Dmitri Mendeleev	Formulated the $Periodic \ Law$ $(1869)$,stating that properties of elements are a periodic function of their atomic weights.
$5$. Lothar Meyer	Plotted physical properties like atomic volume against atomic weight,showing a periodic pattern $(1868)$.
$6$. Henry Moseley	Established the $Modern \ Periodic \ Law$ $(1913)$ by showing that properties are a periodic function of atomic number $(Z)$.