who discovered the periodic table

Dmitri Mendeleev is most widely credited with discovering (or more precisely, inventing) the modern periodic table in 1869.

Quick Scoop: Core Answer

• Russian chemist Dmitri Mendeleev arranged known elements into a table in 1869, leaving gaps for elements that had not yet been discovered.

• His great innovation was predicting the properties of these missing elements (like gallium, scandium, and germanium), and those predictions later proved accurate.

• Because of this, Mendeleev is commonly called “the father of the periodic table,” even though other scientists proposed earlier classification schemes.

Others Involved Before Mendeleev

Several scientists helped pave the way before Mendeleev’s version took over.

• Antoine Lavoisier (1789): Grouped substances into gases, metals, nonmetals, and earths, an early attempt to classify elements.

• Johann Döbereiner (1810s–1820s): Noticed “triads” of elements (like calcium–strontium–barium) with intermediate properties and atomic weights.

• John Newlands (1864): Arranged elements by atomic weight and proposed the “law of octaves,” noting that every eighth element had similar properties.

• Alexandre-Émile Béguyer de Chancourtois (1862): Wrapped element atomic weights around a cylinder (“telluric screw”), revealing a repeating pattern.

Mendeleev vs Other Inventors

Even in modern discussions and videos, the question “who really invented the periodic table?” is treated as a nuanced, almost forum-style debate, because several chemists produced table-like arrangements around the same time.

• Lothar Meyer (Germany) published a very similar table in 1870 and also left gaps for unknown elements, but did not make bold quantitative predictions the way Mendeleev did.

• Scientific societies later honored both Mendeleev and Meyer (for example, the Davy Medal in 1882), but the broader scientific community and textbooks still mainly credit Mendeleev.

• In recognition of his influence, element 101 was named mendelevium in 1955.

Is This a “Trending Topic”?

• The periodic table periodically becomes a “trending topic” around anniversaries, such as the 150th anniversary celebrated in 2019, which prompted news pieces and online discussions about “who really invented it.”

• Educational channels and forums continue to revisit the question, often highlighting the contributions of Newlands, de Chancourtois, and Meyer while still centering Mendeleev as the key figure.

TL;DR

The periodic table, as recognized today, was created by Dmitri Mendeleev in 1869, and his successful predictions of yet-undiscovered elements are the main reason he is credited with its discovery.

Information gathered from public forums or data available on the internet and portrayed here.