Dmitri Mendeleev

Dmitri Ivanovich Mendeleev was a Russian chemist who lived from 1834 to 1907. He is best known for creating the periodic table of elements, a way to organize all the known chemical elements. His big idea was called the periodic law, which showed that elements repeat their properties in a predictable way when arranged by their atomic weights.

Mendeleev’s table was special because it wasn’t just about the elements scientists knew at the time. He used his table to predict that three new elements had not yet been discovered. He even described what these elements — germanium, gallium, and scandium — might be like, such as their weight and how they would react with other substances. Later, these elements were found, and his predictions turned out to be correct!

Because of his amazing work, a new element called mendelevium was named after him. It was made in a laboratory many years after he died. Mendeleev’s periodic table is still used today by scientists and students all over the world to understand and predict how elements will behave.

Early life

Dmitri Mendeleev was born in a village near Tobolsk in Siberia. His father was a school principal and teacher, and his mother came from a family of merchants. Mendeleev was the youngest of 17 siblings, though not all survived. After his father lost his sight and his mother's factory burned down, Mendeleev moved to Saint Petersburg to study.

He studied at the Main Pedagogical Institute and later taught science in Crimea after recovering from tuberculosis. Mendeleev worked in Germany on liquids and the spectroscope, and in 1861 published a textbook that earned him an award. He married in 1862 and became a professor in Saint Petersburg, helping make it a top place for chemistry learning.

Periodic table

See also: History of the periodic table

In 1863, there were 56 known elements, and new ones were being discovered regularly. Scientists had noticed patterns in the elements before, but Dmitri Mendeleev made a big breakthrough. While writing a chemistry textbook, he saw patterns in the elements and created the periodic table. He arranged the elements by their atomic weight and noticed that their properties repeated in a pattern.

Mendeleev’s table was special because he left spaces for elements that had not yet been discovered. He even predicted what these new elements would be like. Later, three elements he predicted — germanium, gallium, and scandium — were found, and they matched his predictions perfectly. He also corrected the known properties of some elements, like uranium, to fit better with his table.

Later life

Dmitri Mendeleev met Anna Ivanovna Popova in 1876 and married her in 1882 after finalizing his divorce from his first wife. Despite his international fame, this led to controversy and prevented him from joining the Russian Academy of Sciences. He had children from both marriages.

Mendeleev resigned from Saint Petersburg University in 1890 and later became director of the Bureau of Weights and Measures. He studied petroleum and helped establish Russia’s first oil refinery. Mendeleev was nominated for the Nobel Prize in Chemistry three times near the end of his life but did not win. He passed away in 1907 in Saint Petersburg from influenza.

Other achievements

Dmitri Mendeleev made many important contributions to science beyond his famous periodic table. He helped start the Russian Chemical Society in 1868 and studied topics like protecting local industries and improving farming.

Mendeleev also worked on understanding how liquids change with heat and helped bring the metric system to the Russian Empire. He even created a special kind of explosive material called pyrocollodion, though it wasn’t used by the navy. He also explored where oil comes from, suggesting it forms deep inside the Earth.

Activities beyond chemistry

In the 1870s, Dmitri Mendeleev began writing about many topics besides chemistry. He looked at Russian industry, farming, and even the Arctic Sea. He helped improve Russia's oil industry by comparing it to the better-known industry in Pennsylvania. He also worked to standardize measurements in Russia, introducing the metric system and setting up inspection systems.

Mendeleev spoke out against spiritualism, believing it held back scientific progress. There is a popular story that he set the strength of vodka at 40%, but this is not true. The standard was set before he was born, and his work focused on measurements and trade, not alcohol production.

Commemoration

Dmitri Mendeleev's legacy lives on through many places and objects named in his honor. In Saint Petersburg, the D. I. Mendeleev Institute for Metrology carries his name, and a statue of him stands nearby with his famous periodic table shown on the wall. The street in front of the Saint Petersburg State University is called Mendeleevskaya liniya, and a memorial museum preserves his archives.

Mendeleev's influence extends beyond Russia. A university in Moscow is named the D. Mendeleyev University of Chemical Technology of Russia. A special chemical element, Mendelevium, was named after him. Even a mineral and a lunar crater bear his name, showing how his work continues to be remembered and celebrated.

Works

Dmitri Mendeleev wrote many important books and articles. Some of his well-known works include his ideas about the periodic law and the properties of elements. His writings also cover topics like solutions, gas pressure, and even thoughts about Russia. Many of these works are collected in three volumes of his complete writings.

He also contributed 54 articles to the Brockhaus and Efron Encyclopedic Dictionary, sharing his knowledge with many readers.