Hydrogen (H)1
Reactive Nonmetal
Bohr model representation
Hydrogen is the most common element in the universe, making up about 75% of its mass.
Symbol:
H
Atomic mass:
1.00784 u
Density (when liquid at melting point):
0.07099 g/cm³
Melting:
-259.16 °C
Boiling:
-252.87 °C
Discovered by:
Henry Cavendish
Year of discovery:
1766
More about Hydrogen