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Hydrogen

  • Symbol: H

  • Atomic Number: 1

  • Atomic Mass: 1.008

  • Electronegativity: 2.20

  • Valence electrons: 1

  • Melting point: -259.2 degrees Celsius

  • Discoverer: Henry Cavendish

  • Group: 1

  • Best react with: Group 7

I TOLD A CHEMISTRY JOKE. THERE WAS NO REACTION.

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