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123-456-7890
THE AMAZING ELEMENT ENCYCLOPEDIA
Hydrogen
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Symbol: H
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Atomic Number: 1
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Atomic Mass: 1.008
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Electronegativity: 2.20
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Valence electrons: 1
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Melting point: -259.2 degrees Celsius
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Discoverer: Henry Cavendish
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Group: 1
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Best react with: Group 7

I TOLD A CHEMISTRY JOKE. THERE WAS NO REACTION.
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