The Legacy of Mendeleev and the Periodic Table's Unseen Genius

The video explores the significance of the periodic table and Dmitri Mendeleev's genius in predicting undiscovered elements. Mendeleev's innovative approach involved leaving gaps for elements not yet discovered, such as eka-aluminum, which was later identified as gallium. His predictions were remarkably accurate, showcasing his deep understanding of chemical properties. Despite not winning a Nobel Prize, Mendeleev's legacy endures, with the element mendelevium named in his honor.

What makes the periodic table more than just a trendy icon?

• It is a comprehensive list of all known elements.

• It is a symbol of human genius and scientific achievement.

• It was the first table to arrange elements by atomic number.

• It was created by the first chemist to study elements.

What was the key aspect of Mendeleev's genius in creating the periodic table?

• He was the first to use atomic numbers.

• He predicted the existence of undiscovered elements.

• He arranged elements alphabetically.

• He grouped elements by color.

What was the predicted atomic weight of eka-aluminum?

• 70

• 65

• 68

• 72

Which element was discovered that matched Mendeleev's prediction of eka-aluminum?

• Gallium

• Technetium

• Germanium

• Scandium

What was the actual atomic weight of gallium, the element predicted by Mendeleev?

• 70.5

• 68

• 69.72

• 67.5

Which element did Mendeleev predict that was later named technetium?

• Eka-carbon

• Eka-boron

• Eka-manganese

• Eka-silicon

How long after Mendeleev's prediction was technetium finally isolated?

• 30 years

• 50 years

• 70 years

• 100 years

What exclusive honor did Mendeleev receive posthumously?

• A Nobel Prize

• An element named after him

• A statue in his hometown

• A university named after him

In what year was the element Mendelevium officially named?

• 1963

• 1955

• 1980

• 1970

How many scientists have had an element named after them?

• 10

• 15

• 20

• 25