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General | |||||||||||||||||||||||||||||||
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Name, Symbol, Number | Hydrogen, H, 1 | ||||||||||||||||||||||||||||||
Chemical series | nonmetals | ||||||||||||||||||||||||||||||
Group, Period, Block | 1 (I), 1 , s | ||||||||||||||||||||||||||||||
Density, Hardness | 0.0899 kg/m, NA | ||||||||||||||||||||||||||||||
Appearance | colorless | ||||||||||||||||||||||||||||||
Atomic Properties | |||||||||||||||||||||||||||||||
Atomic weight | 1.00794 amu | ||||||||||||||||||||||||||||||
Atomic radius (calc) | 25 (53) pm | ||||||||||||||||||||||||||||||
Covalent radius | 37 pm | ||||||||||||||||||||||||||||||
van der Waals radius | 120 pm | ||||||||||||||||||||||||||||||
Electron configuration | 1s | ||||||||||||||||||||||||||||||
e 's per energy level | 1 | ||||||||||||||||||||||||||||||
Oxidation states (Oxide) | 1 (amphoteric) | ||||||||||||||||||||||||||||||
Crystal structure | hexagonal | ||||||||||||||||||||||||||||||
Physical Properties | |||||||||||||||||||||||||||||||
State of matter | gas (__) | ||||||||||||||||||||||||||||||
Melting point | __ K (__ °F) | ||||||||||||||||||||||||||||||
Boiling point | __ K (__ °F) | ||||||||||||||||||||||||||||||
Molar volume | 11.42 ×10 m/mol | ||||||||||||||||||||||||||||||
Heat of vaporization | __ kJ/mol | ||||||||||||||||||||||||||||||
Heat of fusion | __ kJ/mol | ||||||||||||||||||||||||||||||
Vapor pressure | __ Pa at __ K | ||||||||||||||||||||||||||||||
Velocity of sound | 1270 m/s at __ K | ||||||||||||||||||||||||||||||
Miscellaneous | |||||||||||||||||||||||||||||||
Electronegativity | __ (Pauling scale) | ||||||||||||||||||||||||||||||
Specific heat capacity | __ J/(kg*K) | ||||||||||||||||||||||||||||||
Electrical conductivity | __ 10/m ohm | ||||||||||||||||||||||||||||||
Thermal conductivity | __ W/(m*K) | ||||||||||||||||||||||||||||||
1 ionization potential | __ kJ/mol | ||||||||||||||||||||||||||||||
2 ionization potential | __ kJ/mol | ||||||||||||||||||||||||||||||
3 ionization potential | __ kJ/mol | ||||||||||||||||||||||||||||||
4 ionization potential | __ kJ/mol | ||||||||||||||||||||||||||||||
Most Stable Isotopes | |||||||||||||||||||||||||||||||
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SI units & STP are used except where noted. |
Hydrogen is a chemical element in the periodic table that has the symbol H and atomic number 1.
Notable Characteristics
Etymology: Greek hudôr (water) and gennen (generate).
Applications
History
Occurrence
Compounds
Isotopes
Precautions
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