# What event helped the development of the periodic table?

Jun 12, 2017

One event that helped the development of the periodic table was development of the battery.

#### Explanation:

Sir Humprey Davis used the battery to discover elements like potassium and sodium. The discovery of these new elements helped to develop that periodic table.

Jun 12, 2017

The discoveries of hitherto unknown elements that filled in predicted gaps on the then Periodic Table..........

#### Explanation:

Old Mendeleev was astute enuff to realize that when he first published his Periodic Table, NOT ALL of the naturally occurring elements had been isolated and characterized. Using his principle of Periodicity he was able to ANTICIPATE the discovery of new elements, the which would fill gaps in his then Table.

And thus when he first published the table he proposed $\text{eka-silicon}$, $\text{eka-aluminium}$, and $\text{eka-boron}$ as new elements that had not been then isolated and characterized, BUT whose existence would fill an apparent gap in the Table. The subsequent discoveries of "germanium (Z=32, 1886"), "gallium, (Z=31, 1885"), and "scandium" (Z=21, 1879"), , with reasonably-well predicted properties were powerful and convincing evidences of the utility of Mendeleev's Periodic approach.