Hydrogen (H)


H Hydrogen  1.00784 (g/mol)

Latin name: Hydrogenium
English name: Hydrogen
Year discovered: 1766
CAS Number: CAS1333-74-0
Discovered by: Henry Cavendish
Cost per 100 grams: 12 USD
Electron shell: K1 L0 M0 N0 O0 P0 Q0 R0
Electrons: 1
Protons: 1
Neutrons: 0
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.
Atomic number: 1
Atomic weight (Relative atomic mass): 1.00784 (g/mol)
Density: 0.0000899 (g/cm³)
Melting point:
-259.14°C   =   -434.45°F   =   14.01K
Boiling point:
-252.87°C   =   -423.17°F   =   20.28K
Phase: Gas
Valence: I
Period: 1
Group: IA
Block: s – block
Crystal structure: Hexagonal
Grid parameters: a=3.780 Å; c=6.167 Å
Attitude: 1.631

Leave a Comment