What is Lawrencium?

Lawrencium, the one hundred-third element on the periodic table, is a synthetic, radioactive actinide that marks the end of the actinide series.

Atomic Number: 103

Symbol: Lr

Atomic Mass: [262] u (most stable isotope)

Category: Actinide

State at Room Temperature: Solid

Discovered By: Albert Ghiorso, Torbjørn Sikkeland, et al. (1961)

⚛️ Atomic Structure of Lawrencium

Lawrencium has one hundred three protons, one hundred fifty-nine neutrons (in its most stable isotope, Lawrencium-262), and one hundred three electrons, with three in its outer shell.

  • 🟢 Protons: 103
  • 🔴 Neutrons: 159 (Most stable isotope, Lawrencium-262)
  • 🟡 Electrons: 103

💡 Did you know? Lawrencium is the last actinide before the periodic table shifts to transition metals!

🔬 Lawrencium Properties

Lawrencium is radioactive, silvery, and dense. Its melting point is estimated at 1627°C (2961°F), and it emits alpha radiation.

🧬 How Was Lawrencium Discovered?

In 1961, Albert Ghiorso, Torbjørn Sikkeland, and a team synthesized Lawrencium by bombarding californium with boron ions at Berkeley.

⚡ Uses of Lawrencium

  • 🔬 Research: Studying actinide and transition metal properties.
  • ⚡ Synthesis: Precursor to superheavy elements.

💡 Fun Facts About Lawrencium

  • 👨‍🔬 Named after Ernest Lawrence.
  • ⏳ Half-life of 11 hours.
  • 🔚 Last of the actinides.
  • 🏭 Only exists in labs.

⚠️ Safety & Precautions

Lawrencium is radioactive and a radiation hazard. It's produced in trace amounts and requires strict lab containment.

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