🔹 Basic Information

• Element Name: Thulium
• Discovered By: Per Teodor Cleve
• Year of Discovery: 1879
• Category: Lanthanide (Rare Earth Metal)
• Group: f-block
• State at Room Temperature: Solid (silvery-gray metal) ⚙️

Thulium is one of the least abundant rare earth elements, but it’s very useful in medical and laser technology.

🔸 Chemical Properties

• Chemical Symbol: Tm
• Atomic Number: 69
• Atomic Mass: ~168.93 u
• Valency: +3
• Electronic Configuration: [Xe] 4f¹³ 6s²

Thulium is soft, malleable, and slowly tarnishes in air. It forms mostly pale green or bluish compounds.

📘 Basic Things to Know

Thulium is non-toxic, easy to shape, and has a few specialized but powerful applications in science and healthcare.

🤔 Interesting Facts

• Named after Thule, an ancient name for Scandinavia. 🌍
• It’s one of the rarest lanthanides, but still more common than gold! 🟡
• Thulium is used in portable X-ray machines, especially in remote or emergency settings. 🩻
• Tm lasers are also used in eye surgery and medical procedures. 👁️💡
• It glows blue-green in some compounds under UV light! 💙💚

🔧 Common Uses

• Medical Lasers: For surgery and treatment in skin, eyes, and soft tissues. 🔬💡
• X-ray Devices: Thulium-170 isotope is used in compact X-ray machines. 🩻
• High-Tech Applications: In electronics, magnetic materials, and some semiconductors. 💻🔧
• Lighting: Adds color and glow to some lamps and lighting devices. 💡
• Research: Valuable for advanced laser and optical technologies.

📚 Conclusion

Thulium is a rare, gentle metal that shines brightly in medical and high-tech fields. For students, it shows how even the rarest elements can have life-saving and futuristic uses! ✨💠