Although earlier precursors to this presentation exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring trends in the properties of the elements.

Dmitri Mendeleev | Mendeleev's first periodic table ( 1869 )

In 1869, building upon earlier discoveries by such scientists as Lavoisier, Dmitri Mendeleev published the first functional periodic table.

# Chemistry, Dmitri Mendeleev presented his Periodic table being the framework of the modern chemistry

The discovery of the chemical elements has a long history from the days of alchemy and culminating in the creation of the periodic table of the chemical elements by Dmitri Mendeleev ( 1834 – 1907 ) and later discoveries of some synthetic elements.

The discoveries of the chemical elements has a long history culminating in the creation of the periodic table by Dmitri Mendeleev.

In 1869, Dmitri Mendeleev predicted its existence and some of its properties based on its position on his periodic table and called the element ekasilicon.

In his invention of the Periodic Table of the Elements, Mendeleev had interchanged the orders of a few pairs of elements in order to put them in more appropriate places in this table of the elements.

* 1869 – Dmitri Mendeleev presents the first periodic table to the Russian Chemical Society.

In 1902, having accepted the evidence for the elements helium and argon, Dmitri Mendeleev included these noble gases as group 0 in his arrangement of the elements, which would later become the periodic table.

The periodic table of Dmitri Mendeleev published in the 1870s showed a " — " in place after uranium similar to several other places for at that point undiscovered elements.

Although precursors exist, the current table is generally credited to Dmitri Mendeleev, who developed it in 1869 to illustrate periodic trends in the properties of the then-known elements ; the layout has been refined and extended as new elements have been discovered and new theoretical models developed to explain chemical behavior.

Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869.

The existence of a yet undiscovered element at this position in the periodic table had been first predicted by Dmitry Mendeleev.

Mendeleev noted a gap in his periodic table and gave the undiscovered element the provisional name ekamanganese ( Em ).

From the 1860s through 1871, early forms of the periodic table proposed by Dimitri Mendeleev contained a gap between molybdenum ( element 42 ) and ruthenium ( element 44 ).

** 101. mendelevium, Md, named after the Russian chemist Dmitri Mendeleev, credited for being the primary creator of the periodic table of the chemical elements ( 1955 ).

The final stroke in classical atomic theory came when Dimitri Mendeleev saw an order in recurring chemical properties, and created a table presenting the elements in unprecedented order and symmetry.

* Dimitri Mendeleev develops the modern periodic table

* March 6 – Mendeleev makes a formal presentation of his periodic table to the Russian Chemical Society.

* 1871 Dmitri Ivanovich Mendeleev systematically examines the periodic table and predicts the existence of gallium, scandium, and germanium

When Mendeleev proposed his periodic table, he noted gaps in the table, and predicted that as-yet unknown elements existed with properties appropriate to fill those gaps.

To give provisional names to his predicted elements, Mendeleev used the prefixes eka -, dvi -, and tri -, from the Sanskrit names of digits 1, 2, and 3, depending upon whether the predicted element was one, two, or three places down from the known element of the same group in his table.

Dmitri Mendeleev claimed he arranged his tables in order of atomic weight (" Atomgewicht ") However, in deference to the observed chemical properties, he violated his own rule and placed tellurium ( atomic weight 127. 6 ) ahead of iodine ( atomic weight 126. 9 ).

These weights were an important pre-requisite for the discovery of the periodic law by Dmitri Mendeleev and Lothar Meyer.

The existence of gallium had been predicted during 1871 by Dmitri Mendeleev, who called it eka-aluminium, and its discovery was a boost for Mendeleev's theory of the periodic table.

These careful, accurate atomic weight measurements of Stas helped lay the foundation for the periodic system of elements of Dmitri Mendeleev and others.

* Dmitri Mendeleev Russian chemist, creator of the first periodic table

In 1869, Russian chemist Dmitri Mendeleev published his periodic table, which had empty spaces for elements directly above and under yttrium.

* March 6-Dmitri Mendeleev makes a formal presentation of his periodic table to the Russian Chemical Society.

The history of the periodic table reflects over a century of growth in the understanding of chemical properties, and culminates with the publication of the first actual periodic table by Dmitri Mendeleev in 1869.

Many of technetium's properties were predicted by Dmitri Mendeleev before the element was discovered.

In 1871, Mendeleev predicted this missing element would occupy the empty place below manganese and therefore have similar chemical properties.

Professor Dmitri Mendeleev published the first Periodic Table of the Atomic Elements in 1869 based on properties which appeared with some regularity as he laid out the elements from lightest to heaviest.

His results showed unequivocally that Meyer's interpretation was the correct one and that nearly all of the new element's properties matched Mendeleev predictions.

A great breakthrough in making sense of this long list ( as well as in understanding the internal structure of atoms as discussed below ) was Dmitri Mendeleev and Lothar Meyer's development of the periodic table, and particularly Mendeleev's use of it to predict the existence and the properties of germanium, gallium, and scandium, which Mendeleev called ekasilicon, ekaaluminium, and ekaboron respectively.

Mendeleev made his prediction in 1870 ; gallium was discovered in 1875, and was found to have roughly the same properties that Mendeleev predicted for it.

* Lanthanoid contraction, the decrease in size of the ionic radius of lanthanide elements with their growing atomic number ( series of Rare Earth Elements ( REE ) in the Mendeleev Table )

Mendeleev arranged the elements in a table ordered by atomic mass, corresponding to relative molar mass as defined today.

* Mendeleev predicted the discovery of other elements and left space for these new elements, namely eka-silicon ( germanium ), eka-aluminium ( gallium ), and eka-boron ( scandium ).

Only a few months after Mendeleev published his periodic table of all known elements ( and predicted some new elements to complete the table, plus some corrected atomic weights ), Meyer published a virtually identical table.