Hydrogen
| Definition: |
Hydrogen. The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight 1. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM. |
| Notes: |
H or H1; H2 or 2H (superscript) = DEUTERIUM, H2 (subscript) = HYDROGEN; H3 or 3H = TRITIUM; prod of H ions = probably PH |
| CAS Type 1 Name: |
CAS Number: |
1333-74-0 |
Hydrogen Definitions and Terms
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