General: |
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Name: Hydrogen
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Symbol: H
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Group: Non-Metal
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Atomic weight: 1.0079
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Density @ 293 K: 0.0000899 g/cm3
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Atomic volume: 14.4 cm3/mol
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Group: Non-Metal
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discovered: 1766
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States: |
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state (s, l, g): g
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melting point: 14.06 K
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boiling point: 20.4 K
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Heat of fusion: 0.05868 kJ/mol
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Heat of vaporization: 0.44936 kJ/mol
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Energies: |
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1st ionization energy: 1312 kJ/mole
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electronegativity: 2.2
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2nd ionization energy: kJ/mole
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electron affinity: 72.7711 kJ/mole
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3rd ionization energy: kJ/mole
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Specific heat: 14.304 J/gK
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heat atomization: 218 kJ/mole atoms
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Oxidation & Electrons: |
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Shells: 1
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electron configuration: 1s1
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minimum oxidation number: -1
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maximum oxidation number: 1
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min. common oxidation no.: -1
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max. common oxidation no.: 1
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Appearance & Characteristics: |
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structure: hcp: hexagonal close pkd
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color: colorless
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uses: rocket fuel
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toxicity:
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hardness: mohs
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characteristics: diatomic,dens
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Reactions: |
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reaction with air: vigorous, =>H2O
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reaction with 6M HCl: none
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reaction with 6M HCl: none
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reaction with 15M HNO3: none
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reaction with 6M NaOH: none
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Other Forms: |
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number of isotopes: 3
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hydride(s): H2
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oxide(s): H2O
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chloride(s): HCl
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Radius: |
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ionic radius (2- ion): pm
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ionic radius (1- ion): pm
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atomic radius: 37.1 pm
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ionic radius (1+ ion): pm
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ionic radius (2+ ion): pm
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ionic radius (3+ ion): pm
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Conductivity: |
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thermal conductivity: 0.18 J/m-sec-deg
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electrical conductivity: 1/mohm-cm
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polarizability: 0.7 A^3
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Abundance: |
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source: Water, methane
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rel. abund. solar system: 10.446 log
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abundance earth's crust: 3.1 log
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cost, pure: 12 $/100g
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cost, bulk: $/100g
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