🔹 Basic Information

• Element Name: Francium
• Discovered By: Marguerite Perey
• Year of Discovery: 1939
• Category: Alkali Metal
• Group: 1 (Alkali metals)
• State at Room Temperature: Solid (theoretical; hasn’t been seen in bulk form) ⚙️

Francium is a highly radioactive and extremely rare element that exists only in tiny amounts in nature.

🔸 Chemical Properties

• Chemical Symbol: Fr
• Atomic Number: 87
• Atomic Mass: ~223 u (most stable isotope)
• Valency: +1
• Electronic Configuration: [Rn] 7s¹

Francium is the most reactive alkali metal, even more than cesium! 💥

📘 Basic Things to Know

Francium is so rare and unstable that scientists have never collected enough to see it with the naked eye. Most of what we know is from predictions and brief lab observations.

🤔 Interesting Facts

• Named after France, the home country of its discoverer 🇫🇷
• It’s estimated that only about 20–30 grams of francium exist on Earth at any time 🌍
• Too unstable for practical use — it decays quickly into other elements ☢️
• Francium is created as a decay product of actinium-227
• Because it’s so reactive, it would explode instantly in water 💧💥

🔧 Common Uses

⚠️ Francium has no commercial or industrial use due to its extreme rarity and short half-life.

• Scientific Research Only: Used in atomic structure and radioactivity studies 🔬
• Educational Demonstrations: Helps teach about trends in the alkali metals ⚛️📘
• Theoretical Chemistry: Scientists use computer models to study its properties 🧠💻

📚 Conclusion

Francium is a mystery metal — the most reactive and one of the rarest elements ever found. For students, it’s a perfect example of how the periodic table holds secrets we’re still discovering! 🔍🌟