Hydrogen (H)

Atomic number: 1 · Category: diatomic nonmetal · Group 1 · Period 1 · Phase: Gas

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 mass: 1.008

Density: 0.08988

Melting point: 13.99 K

Boiling point: 20.271 K

Appearance: colorless gas

Source: Wikipedia

Block: s

Molar heat: 28.836

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