Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1. With a standard atomic weight of 1.008 , hydrogen is the lightest element on the periodic table . Its monatomic form (H) is the most abundant chemical substance in the Universe , constituting roughly 75% of all baryonic mass. [7] [note 1] Non- remnant stars are mainly composed of hydrogen in the plasma state . The most common isotope of hydrogen, termed protium (name rarely used, symbol 1 H), has one proton and no neutrons .
Page Revisions
| Year | Metadata | Sections | Top Words | First Paragraph |
| 2018 |
424107 characters 34 sections 79 paragraphs 27 images 679 internal links 188 external links |
hydrogen 0.713 h2 0.279 gas 0.121 hydrides 0.114 para 0.114 proton 0.098 reaction 0.098 compounds 0.095 ortho 0.092 electron 0.087 molecular 0.086 hydride 0.086 metals 0.082 protons 0.082 atom 0.079 |
Hydrogen is a chemical element with symbol H and atomic number 1. With a standard atomic weight of 1.008 , hydrogen is the lightest element on the periodic table . Its monatomic form (H) is the most abundant chemical substance in the Universe , constituting roughly 75% of all baryonic mass. [7] [note 1] Non- remnant stars are mainly composed of hydrogen in the plasma state . The most common isotope of hydrogen, termed protium (name rarely used, symbol 1 H), has one proton and no neutrons . |
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| 2017 |
408734 characters 32 sections 75 paragraphs 25 images 666 internal links 173 external links |
hydrogen 0.704 h2 0.290 gas 0.119 hydrides 0.119 para 0.119 reaction 0.102 compounds 0.099 proton 0.096 ortho 0.095 electron 0.090 hydride 0.089 metals 0.086 protons 0.085 atom 0.082 quantum 0.079 |
Hydrogen is a chemical element with symbol H and atomic number 1. With a standard atomic weight of 1.008 , hydrogen is the lightest element on the periodic table . Its monatomic form (H) is the most abundant chemical substance in the Universe , constituting roughly 75% of all baryonic mass. [7] [note 1] Non- remnant stars are mainly composed of hydrogen in the plasma state . The most common isotope of hydrogen, termed protium (name rarely used, symbol 1 H), has one proton and no neutrons . |
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| 2016 |
455152 characters 32 sections 75 paragraphs 30 images 914 internal links 163 external links |
hydrogen 0.702 h2 0.292 hydrides 0.120 para 0.120 gas 0.117 reaction 0.103 compounds 0.100 proton 0.097 ortho 0.096 electron 0.091 hydride 0.090 metals 0.086 protons 0.086 atom 0.083 quantum 0.080 |
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.007 94 u , hydrogen is the lightest element on the periodic table . Its monatomic form (H) is the most abundant chemical substance in the Universe , constituting roughly 75% of all baryonic mass. [7] [note 1] Non- remnant stars are mainly composed of hydrogen in the plasma state. The most common isotope of hydrogen, termed protium (name rarely used, symbol 1 H), has one proton and no neutrons . |
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| 2015 |
433788 characters 32 sections 73 paragraphs 29 images 902 internal links 156 external links |
hydrogen 0.700 h2 0.297 hydrides 0.122 para 0.122 gas 0.119 reaction 0.099 ortho 0.098 compounds 0.097 protons 0.095 proton 0.093 metals 0.088 quantum 0.081 molecular 0.080 hydride 0.080 atom 0.076 |
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.007 94 u , hydrogen is the lightest element on the periodic table . Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. [7] [note 1] Non- remnant stars are mainly composed of hydrogen in its plasma state. The most common isotope of hydrogen, termed protium (name rarely used, symbol 1 H), has one proton and no neutrons . |
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| 2014 |
421790 characters 34 sections 75 paragraphs 28 images 888 internal links 142 external links |
hydrogen 0.696 h2 0.300 hydrides 0.123 para 0.123 gas 0.121 reaction 0.100 ortho 0.099 compounds 0.098 protons 0.096 proton 0.094 metals 0.089 quantum 0.082 molecular 0.081 hydride 0.081 anaerobic 0.074 |
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u , hydrogen is the lightest element on the periodic table . Its monatomic form (H) is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. [7] [note 1] Non- remnant stars are mainly composed of hydrogen in its plasma state. The most common isotope of hydrogen, termed protium (name rarely used, symbol 1 H), has a single proton and zero neutrons . |
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| 2013 |
384729 characters 33 sections 75 paragraphs 23 images 705 internal links 141 external links |
hydrogen 0.696 h2 0.300 hydrides 0.123 para 0.123 gas 0.121 reaction 0.100 ortho 0.099 compounds 0.098 proton 0.094 metals 0.089 protons 0.088 atom 0.085 molecular 0.081 hydride 0.081 quantum 0.074 |
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.007 94 u , hydrogen is the lightest element on the periodic table . Its monatomic form (H) is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. [7] [note 1] Non- remnant stars are mainly composed of hydrogen in its plasma state. The most common isotope of hydrogen, termed protium (name rarely used, symbol 1 H), has a single proton and zero neutrons . |
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| 2012 |
382809 characters 33 sections 79 paragraphs 23 images 704 internal links 134 external links |
hydrogen 0.687 h2 0.317 hydrides 0.123 para 0.123 gas 0.118 reaction 0.100 ortho 0.099 protons 0.096 proton 0.094 compounds 0.093 metals 0.089 atom 0.085 quantum 0.082 hydride 0.081 molecular 0.075 |
Hydrogen is a chemical element with symbol H and atomic number 1. With an atomic weight of 1.007 94 u ( 1.007 825 u for hydrogen-1 ), hydrogen is the lightest element and its monatomic form (H 1 ) is the most abundant chemical substance, constituting roughly 75% of the Universe's baryonic mass. [7] Non- remnant stars are mainly composed of hydrogen in its plasma state. |
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| 2011 |
376823 characters 31 sections 76 paragraphs 22 images 665 internal links 134 external links |
hydrogen 0.680 h2 0.329 hydrides 0.124 para 0.124 gas 0.122 reaction 0.101 ortho 0.099 protons 0.097 proton 0.095 compounds 0.094 metals 0.089 atom 0.085 quantum 0.083 molecular 0.082 hydride 0.081 |
Hydrogen ( / [invalid input: 'icon'] ˈ h aɪ d r [invalid input: 'ɵ'] dʒ [invalid input: 'ɨ'] n / HY -drə-jin ) [7] is the chemical element with atomic number 1. It is represented by the symbol H . With an average atomic weight of 1.007 94 u ( 1.007 825 u for hydrogen-1 ), hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. [8] Stars in the main sequence are mainly composed of hydrogen in its plasma state. Naturally occurring elemental hydrogen is relatively rare on Earth. |
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| 2010 |
360851 characters 29 sections 71 paragraphs 18 images 655 internal links 120 external links |
hydrogen 0.682 h2 0.327 hydrides 0.127 para 0.127 gas 0.121 reaction 0.103 ortho 0.102 compounds 0.101 proton 0.097 protons 0.091 atom 0.087 quantum 0.084 metals 0.084 hydride 0.083 electron 0.075 |
Hydrogen ( / [invalid input: 'icon'] ˈ h aɪ d r [invalid input: 'ɵ'] dʒ [invalid input: 'ɨ'] n / HYE -dro-jin ) [7] is the chemical element with atomic number 1. It is represented by the symbol H . With an average atomic weight of 1.007 94 u ( 1.007 825 u for Hydrogen-1 ), hydrogen is the lightest and most abundant chemical element, constituting roughly 75 % of the Universe's chemical elemental mass. [8] Stars in the main sequence are mainly composed of hydrogen in its plasma state. Naturally occurring elemental hydrogen is relatively rare on Earth . |
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| 2009 |
344850 characters 27 sections 61 paragraphs 18 images 643 internal links 105 external links |
hydrogen 0.691 h2 0.322 gas 0.132 hydrides 0.132 para 0.132 ortho 0.106 compounds 0.105 proton 0.101 metals 0.095 hydride 0.087 atom 0.083 reaction 0.082 quantum 0.079 oxide 0.073 protons 0.068 |
Hydrogen ( pronounced /ˈhaɪdrɵdʒɨn/ (deprecated template) , [7] HYE -dro-jin ) is the chemical element with atomic number 1. It is represented by the symbol H . With an atomic weight of 1.007 94 u , hydrogen is the lightest and most abundant chemical element, constituting roughly 75 % of the Universe's elemental mass. [8] Stars in the main sequence are mainly composed of hydrogen in its plasma state. Naturally occurring elemental hydrogen is relatively rare on Earth . |
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| 2008 |
305421 characters 24 sections 58 paragraphs 18 images 550 internal links 119 external links |
hydrogen 0.680 h2 0.331 hydrides 0.140 para 0.140 gas 0.130 ortho 0.112 compounds 0.111 proton 0.107 metals 0.101 reaction 0.093 hydride 0.092 atom 0.070 production 0.069 oxide 0.069 quantum 0.065 |
Hydrogen ( Template:PronEng [7] ) is the chemical element with atomic number 1. It is represented by the symbol H . At standard temperature and pressure , hydrogen is a colorless , odorless , nonmetallic , tasteless , highly flammable diatomic gas with the molecular formula H 2 . With an atomic weight of 1.00794, hydrogen is the lightest element. |
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| 2007 |
170319 characters 25 sections 61 paragraphs 16 images 483 internal links 34 external links |
hydrogen 0.625 h2 0.449 hydrides 0.140 para 0.140 gas 0.117 ortho 0.112 compounds 0.111 quantum 0.103 proton 0.100 atom 0.097 reaction 0.094 hydride 0.092 energy 0.089 metals 0.085 production 0.081 |
Hydrogen ( Template:PronEng ), is the chemical element represented by the symbol H and an atomic number of 1. At standard temperature and pressure it is a colourless, odorless, nonmetallic , tasteless, highly flammable diatomic gas (H 2 ). |
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| 2006 |
117300 characters 25 sections 53 paragraphs 14 images 353 internal links 23 external links |
hydrogen 0.599 h2 0.458 hydrides 0.149 para 0.149 gas 0.121 ortho 0.120 compounds 0.118 quantum 0.109 proton 0.107 atom 0.103 reaction 0.100 hydride 0.098 energy 0.094 production 0.092 metals 0.091 |
Hydrogen ( IPA : /ˈhaɪdrə(ʊ)dʒən/) , is a chemical element that has the symbol H and an atomic number of 1. At standard temperature and pressure it is a colorless, odorless, nonmetallic , tasteless, highly flammable diatomic gas (H 2 ). With an atomic mass of 1.00794 g/ mol , hydrogen is the lightest element. |
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| 2005 |
69993 characters 11 sections 30 paragraphs 7 images 244 internal links 11 external links |
hydrogen 0.692 tritium 0.206 element 0.183 ortho 0.160 para 0.152 atom 0.143 proton 0.120 deuterium 0.109 gas 0.106 atoms 0.105 acids 0.099 electron 0.099 isotope 0.098 protium 0.091 lightest 0.086 |
Hydrogen ( Latin : hydrogenium , from Greek : hydro : water, genes : forming) is a chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, nonmetallic , univalent , tasteless, highly flammable diatomic gas . Hydrogen is the lightest and most abundant element in the universe . It is present in water , all organic compounds (rare exceptions exist, like buckminsterfullerene ) and in all living organisms. Hydrogen is able to react chemically with most other elements. Stars in their main sequence are overwhelmingly composed of hydrogen in its plasma state. The element is used in ammonia production, as a lifting gas, as an alternative fuel , and more recently as a power source of fuel cells . |
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| 2004 |
39690 characters 12 sections 26 paragraphs 3 images 198 internal links 7 external links |
hydrogen 0.697 ortho 0.217 element 0.190 tritium 0.186 para 0.172 isotope 0.133 deuterium 0.129 proton 0.104 atom 0.097 acids 0.096 protium 0.093 nucleus 0.092 lightest 0.087 gas 0.084 compounds 0.082 |
Hydrogen ( Latin : hydrogenium ) is the chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, non-metallic , univalent , highly flammable diatomic gas . Hydrogen is the lightest and most abundant element in the universe . It is present in water and in all organic compounds and living organisms. Hydrogen is able to react chemically with most other elements. Stars in their main sequence are overwhelmingly composed of hydrogen in its plasma state. This element is used in ammonia production, as a lifting gas, as an alternative fuel , and more recently as a power-source of fuel cells . |
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| 2003 |
26849 characters 10 sections 18 paragraphs 2 images 165 internal links 4 external links |
hydrogen 0.648 element 0.270 ortho 0.143 protium 0.143 deuterium 0.141 lightest 0.134 compounds 0.126 flammable 0.106 para 0.106 gas 0.105 neutrons 0.100 production 0.098 tritium 0.095 proton 0.091 forms 0.089 |
Hydrogen ( Wiktionary:Hydrogen ) is a chemical element in the periodic table that has the symbol H and atomic number 1. A colorless, odorless, non-metal , univalent, highly flammable diatomic gas, hydrogen is the lightest and most abundant element in the universe and is present in water and in all organic compounds and living organisms. Hydrogen is able to chemically react with most elements. Stars in their main sequence are overwhelmingly composed of hydrogen in its plasma state. This element is used in ammonia production, as a lifting gas, an alternative fuel, and more recently as a power-source of fuel cells . |
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| 2002 |
23877 characters 9 sections 15 paragraphs 0 images 157 internal links 2 external links |
hydrogen 0.611 element 0.290 ortho 0.154 protium 0.154 deuterium 0.152 lightest 0.144 compounds 0.135 isotope 0.126 flammable 0.114 para 0.114 neutrons 0.107 tritium 0.103 gas 0.101 proton 0.098 forms 0.096 |
Hydrogen is a chemical element in the periodic table that has the symbol H and atomic number 1. A colorless, odorless, non-metal , univalent, highly flammable diatomic gas, hydrogen is the lightest and most abundant element in the universe and is present in water and in all organic compounds and living organisms. Hydrogen is able to chemically react with most elements. Stars in their main sequence are overwhelmingly composed of hydrogen in its plasma state. This element is used in ammonia production, as a lifting gas, an alternative fuel, and more recently as a power-source of fuel cells . |
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| 2001 |
3727 characters 0 sections 12 paragraphs 0 images 22 internal links 0 external links |
hydrogen 0.395 element 0.274 exceedingly 0.240 h2 0.202 h3o 0.161 hydrides 0.161 stp 0.161 metallic 0.150 tritium 0.145 solute 0.145 ions 0.143 electronegativity 0.136 hydride 0.136 lightest 0.136 diatomic 0.129 |
The lightest chemical element and the most abundant in the universe, around 75% of normal matter, consisting of a single proton and electron . The most common isotope has no neutrons , although there are two others - deuterium with one, and radioactive tritium with two. |