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Dmitri Mendeleev


In 1869 the Russian chemist Dmitri Mendeleev came up with organizing the elements according to their atomic weight in the form of rows and columns that had been known at that time.

He had a very genius mind,because he had left gaps in his periodic table which had not been discovered during his time.

But,he was able to predict the existence and also the properties of these elements

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As a honor of him the element "Mendelevium" with atomic number 101 was named after him

Watch a clear video about him