What is Sodium?

Sodium, the eleventh element on the periodic table, is a soft, silvery alkali metal known for its extreme reactivity. It's a key component of salt and vital to life.

Atomic Number: 11

Symbol: Na

Atomic Mass: 22.990 u

Category: Alkali Metal

State at Room Temperature: Solid

Discovered By: Humphry Davy (1807)

⚛️ Atomic Structure of Sodium

Sodium has eleven protons, twelve neutrons (in its most common isotope, Sodium-23), and eleven electrons, with one in its outer shell, making it highly reactive.

  • 🟢 Protons: 11
  • 🔴 Neutrons: 12 (Most common isotope, Sodium-23)
  • 🟡 Electrons: 11

💡 Did you know? Sodium-24, a radioactive isotope, is used in medical imaging and leak detection!

🔬 Sodium Properties

Sodium is soft enough to cut with a knife and has a low density, floating on water while reacting violently. It's a good conductor of electricity.

🧪 How Was Sodium Discovered?

In 1807, English chemist Humphry Davy isolated Sodium by electrolyzing sodium hydroxide, marking a breakthrough in alkali metal discovery.

⚡ Uses of Sodium

  • 🧂 Food: Sodium chloride (table salt) for seasoning and preservation.
  • 💡 Lighting: Sodium vapor in streetlights for bright yellow glow.
  • 🏭 Industry: Used in soap, paper, and chemical production.
  • ☢️ Nuclear: Liquid sodium as a coolant in fast-breeder reactors.

💡 Fun Facts About Sodium

  • 🔥 Burns with a bright yellow flame in flame tests.
  • 💥 Explodes on contact with water, releasing hydrogen gas.
  • 🧠 Essential for nerve function in the body.
  • 🌍 Abundant in Earth's crust as sodium compounds.

⚠️ Safety & Precautions

Sodium is highly reactive, igniting or exploding with water or air. It must be stored in oil or inert gases and handled with extreme care.

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