Dmitri Mendeleev

Who?

• Dmitri Mendeleeve
• He was a Russian Chemist.

When and Where he worked

• He went to Heidelberg to start a lab in 1860
• Returned to St. Petersburg in 186

WHEN AND WHERE CONT.

• Became a professor of chemistry in the technological institute in St. Petersburg in 1863.

When and Where cont.

• In 1893, he was appointed director of the bureau of weights in measure, where he worked until he died.

WHat he discovered

• He made the periodic table
• In 1860 Bunsen and Gustav Kirchhoff discovered the element Cesium (Cs)

HOW HE DISCOVERED IT

• They used chemical spectroscopy to find Cesium

Why it is important to the atom

• In 1860 he went to the first international chemistry conference
• He learned that "All gases" at the same volume, temperature, and pressure, contained the same number of molecules