What Is Californium?

Californium, the ninety-eighth element on the periodic table, is a synthetic, radioactive actinide with powerful applications in science and technology.

Atomic Number: 98

Symbol: Cf

Atomic Mass: [251] u (most stable isotope)

Category: Actinide

State at Room Temperature: Solid

Discovered By: Stanley G. Thompson, Kenneth Street Jr., et al. (1950)

⚛️ Atomic Structure of Californium

Californium has ninety-eight protons, one hundred fifty-three neutrons (in its most stable isotope, Californium-251), and ninety-eight electrons, with two in its outer shell.

  • 🟢 Protons: 98
  • 🔴 Neutrons: 153 (Most stable isotope, Californium-251)
  • 🟡 Electrons: 98

💡 Did you know? Californium is one of the most expensive elements, costing millions per gram!

🔬 Californium Properties

Californium is radioactive, silvery, and dense. It has a melting point of about 900°C (1652°F) and is a strong neutron emitter.

🧪 How Was Californium Discovered?

In 1950, American scientists Stanley G. Thompson, Kenneth Street Jr., and others synthesized Californium by bombarding curium at Berkeley.

⚡ Uses of Californium

  • 🔬 Research: Neutron source for experiments.
  • 🩺 Medicine: Cancer treatment via neutron therapy.
  • 🏭 Industry: Detecting flaws in materials.

💡 Fun Facts About Californium

  • 🌴 Named after California.
  • ⏳ Half-life of 2.645 years (Cf-252).
  • 💰 Extremely costly.
  • ⚡ Powerful neutron emitter.

⚠️ Safety & Precautions

Californium is highly radioactive and a radiation hazard. It requires extreme caution and specialized containment.

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