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 VISUAL CHEMISTRY

HYDROGEN
PROPERTIES
Relative atomic mass 1.008
Atomic mass (kg) 1.67  x 10-27
Density (g/cm3) 0.07
Physical State at STP  Diatomic gas (H2)
Melting point (°C) - 259
Boiling point (°C) - 252
Crystal Structure of solid element Close packed hexagonal
Stable isotopes 1H, 2H

STP = standard temperature and pressure. Usually considered as room temperature and pressure.
 
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