Chemical Name:    Hydrogen
Chemical Symbol: H
Atomic Number:    1
Atomic Mass:         1.0079
Melting Point:   - 259.1  oC
Boiling Point:    - 252.7  oC

Hydrogen never stay alone, but always in substance as H2. as hydrogen gas. Hydrogen gas can produce by simple experiment in electrolysis of water. Hydrogen can be react with other gas to form a substance:
  • Hydrogen Peroxide
  • Hydrogen Selenide
  • Hydrogen Sulfide
Hydrogen always formed hydrogen gas H2


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