Technetium - Periodic Table of Videos

TL;DR

Technetium, the first synthetic element, has a fascinating history from prediction to discovery and applications in medicine.

Transcript

one of the big surprises of the whole Periodic Video project for me, was my actually seeing a sample of Technetium. Before I tell you how I saw it, let me explain why I was surprised. Technetium is one of four elements that were predicted by Mendeleev, to exist in the Periodic Table, but had not yet been discovered. He predicted it first to have an... Read More

Key Insights

• ❓ Mendeleev's prediction of Technetium's existence influenced its discovery.
• 🥺 Segrè and Perrier's synthesis of Technetium led to naming rules for new elements by Paneth.
• 💊 Technetium's applications in medicine for tumor imaging showcase its unique properties.
• ❓ Technetium's presence in uranium deposits and natural nuclear reactors highlight its natural occurrence.

Questions & Answers

Q: How was Technetium discovered?

Technetium was first synthesized by Segrè and Perrier from a radiated sample of Molybdenum, leading to the first synthetic element in 1937.

Q: Why was Technetium's name controversial?

Technetium's name was chosen for being synthetic, leading to debates on whether synthetic elements should be included on the Periodic Table.

Q: What is a unique application of Technetium?

Technetium-99m is used in medicine for tumor imaging due to its metastable state emitting gamma rays to detect tumors selectively.

Q: How did geologists discover natural Technetium?

Natural Technetium was found in Gabon in 1972 due to a natural nuclear reactor, showing its presence in uranium deposits.

Summary & Key Takeaways

• Mendeleev predicted Technetium's existence between Molybdenum and Ruthenium.

• Technetium was synthesized by Segrè and Perrier, leading to naming rules for new elements by Paneth.

• Technetium's discovery, synthesis, and application in medicine showcase its unique properties and importance.