Home 1 H Hydrogen back to the periodic table

Atomic number   1
Symbol   H
Atomic weight   1.00794
Density [g/l]   0.084
Melting point [°C]   -259.2
Boiling point [°C]   -252.9
1st Ionization energy [eV]   13.598
Electronic configuration   1s
Oxidation number (most stable)   1, -1
Atomic radius [pm]   37.3
Ionic radius [pm]   208 (1-)
Abundance in crustal rocks [ppm]   1520
Origin of the name   (lat./greek) hydrogenium, meaning water generator
Discovery   1766 by Henry Cavendish
Uses   for the technical hydrogenation of fats and oils and for chemical synthesis like the one of methanol, in former times for filling of airships, today replaced by helium. In future hydrogen may be used as a replacement for fossil fuels.

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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