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hydrogen [H]
From the Greek: hydro genes (water forming) First recognized as an element by Henry Cavendish in 1766. It is the simplest & lightest of all elements.
Occurrence:
1) most abundant element in the universe
2) primary fuel for stars
Characteristics:
-> exists as a colorless odorless highly flammable & explosive diatomic gas
Uses:
- production of NH3
- hydrogenation of unsaturated fatty acids
Related
periodic table
Specific
deuterium
tritium
General
chemical element
Properties
SIZE: AW = 1.00797
atomic number
VALUE: 1
VALENCE: 1S1
Database Correlations
PUBCHEM cid=783
References
- Webster's Ninth New Collegiate Dictionary, Miriam-
Webster Inc. Springfield, MA 1990
- Klinman, J, Chemical & Engineering News, Sept 8, 2003, pg 30