🔹 Basic Information

• Element Name: Actinium
• Discovered By: Friedrich Oskar Giesel
• Year of Discovery: 1899
• Category: Actinide (Radioactive Metal)
• Group: f-block
• State at Room Temperature: Solid (silvery-white metal) ⚙️

Actinium is a radioactive metal found in uranium ores and is the first element in the actinide series.

🔸 Chemical Properties

• Chemical Symbol: Ac
• Atomic Number: 89
• Atomic Mass: ~227.03 u
• Valency: +3
• Electronic Configuration: [Rn] 6d¹ 7s²

Actinium is highly radioactive and reacts quickly with oxygen and moisture.

📘 Basic Things to Know

Actinium glows faintly in the dark due to its radioactivity and has been used in radiation therapy for cancer treatment.

🤔 Interesting Facts

• Named from the Greek word “aktinos” meaning “ray” because of its strong radioactivity ⚡
• It was the first of the actinides discovered
• Extremely rare and mostly obtained from decay of uranium and thorium ores 🌍
• Used as a radiation source in scientific instruments and cancer treatment 🏥
• Glows blue due to its radioactive emissions 💙

🔧 Common Uses

• Cancer Treatment: Used in targeted alpha therapy (TAT) for certain cancers 🎯🩺
• Scientific Research: Studied for its radioactive properties and behavior ⚛️🔬
• Radiation Source: Used in neutron sources and measuring instruments 🔧
• Tracer Element: Helps in understanding geological and environmental processes 🌿🌎

📚 Conclusion

Actinium is a rare and powerful radioactive element playing an important role in medicine and research. For students, it highlights how radioactivity can be both useful and fascinating! 🌟⚛️