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1834 births1907 deathsAcademic staff of Military Engineering-Technical UniversityAcademic staff of the Saint Petersburg State Institute of Technology

Dmitri Mendeleev

Adapted from Wikipedia · Explorer experience

Historic diagram of the periodic table of elements created by Dmitri Mendeleev in 1871.

Dmitri Mendeleev

Dmitri Mendeleev was a clever scientist from Russia. He loved chemistry and wanted to find a way to organize all the different elements. An element is a tiny piece of matter that makes up everything around us, like oxygen in the air or gold in jewelry.

In 1869, Mendeleev made a special chart called the periodic table of elements. This table helps scientists see how elements are related to each other. He noticed that when elements are lined up by their weight, their properties repeat in a pattern. This idea is called the periodic law.

Mendeleev’s table was very smart because he left spaces for elements that had not been found yet. He even guessed what these new elements might be like! Amazingly, when scientists later discovered three of these elements — germanium, gallium, and scandium — they matched his guesses perfectly.

Because of his wonderful work, a new element called mendelevium was named after him. This element was made in a lab many years after he passed away. Today, scientists all over the world still use Mendeleev’s periodic table to learn about elements.

Early Life

Mendeleev was born in 1834 near Tobolsk in Siberia. His father was a school principal, and his mother came from a family of merchants. He was one of 17 children! After his father could no longer see and his mother’s factory burned down, Mendeleev moved to Saint Petersburg to study.

He went to the Main Pedagogical Institute and later taught science. He also studied in Germany and worked with special tools to look at liquids. In 1861, he wrote a book about chemistry and won an award for it.

Legacy

Mendeleev did more than just create the periodic table. He helped start the Russian Chemical Society and worked on many science projects. He also studied oil and helped improve how Russia measured things by bringing in the metric system.

Even today, Mendeleev is remembered. Places and things are named after him, like the D. I. Mendeleev Institute for Metrology in Saint Petersburg and a special element called mendelevium. His ideas continue to help scientists discover new things about the world.

Images

Portrait of Marija Dmitrievna Mendeleeva, the mother of famous scientist Dmitri Mendeleev, painted in the 19th century.
A historical oil painting from the 1800s showing Ivan Pavlovich Mendeleev, a family member of the famous chemist Dmitri Mendeleev.
Portrait of Anna Ivanovna Mendeleeva, the second wife of Dmitri Mendeleev, a famous Russian chemist.
A group portrait of notable scientists from the 1900s celebrating the 200th anniversary of the Berlin Academy.
Portrait of Dmitry Mendeleev, the famous scientist, wearing academic robes.
Signature of Dmitri Mendeleyev, the famous Russian chemist who created the periodic table of elements.
A profile medal honoring Dmitri Mendeleev, the famous scientist known for developing the periodic table of elements.

This article is a child-friendly adaptation of the Wikipedia article on Dmitri Mendeleev, available under CC BY-SA 4.0.

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