Improve your vocabulary with English Vocabulary in Use from Cambridge.Learn the words you need to communicate with confidence. },{ { bidder: 'sovrn', params: { tagid: '446382' }}, { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_btmslot_300x250' }}, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162050', zoneId: '776336', position: 'btf' }}, Improve your vocabulary with English Vocabulary in Use from Cambridge.Learn the words you need to communicate with confidence. type: "html5", { bidder: 'appnexus', params: { placementId: '19042093' }}, }); { bidder: 'appnexus', params: { placementId: '11654208' }}, "sign-out": "https://dictionary.cambridge.org/auth/signout?rid=READER_ID" },{ { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot' }}]}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, storage: { : a nonmetallic gaseous chemical element with atomic number 1 that is the simplest and lightest of the elements and that is used especially in the processing of fossil fuels and the synthesis of ammonia — see Chemical Elements Table — compare deuterium, tritium. { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_rightslot2_flex' }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot2' }}]}]; { bidder: 'ix', params: { siteId: '195465', size: [300, 250] }}, iasLog("exclusion label : lcp"); var pbAdUnits = getPrebidSlots(curResolution); "authorization": "https://dictionary.cambridge.org/us/auth/info?rid=READER_ID&url=CANONICAL_URL&ref=DOCUMENT_REFERRER&type=ENTRY_TRANSLATE&v1=english&v2=hydrogen&v3=&v4=english&_=RANDOM", },{ {code: 'ad_rightslot', pubstack: { adUnitName: 'cdo_rightslot', adUnitPath: '/2863368/rightslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, { bidder: 'ix', params: { siteId: '195451', size: [300, 50] }}, a. a flammable colourless gas that is the lightest and most abundant element in the universe. These examples are from corpora and from sources on the web. },{ { bidder: 'openx', params: { unit: '539971081', delDomain: 'idm-d.openx.net' }}, Click on the arrows to change the translation direction. { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_btmslot_300x250' }}, { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_rightslot2_flex' }}, googletag.pubads().setTargeting("sfr", "cdo_dict_english"); var mapping_houseslot_a = googletag.sizeMapping().addSize([963, 0], [300, 250]).addSize([0, 0], []).build(); { bidder: 'sovrn', params: { tagid: '387233' }}, { bidder: 'ix', params: { siteId: '195451', size: [300, 250] }}, { bidder: 'appnexus', params: { placementId: '11654149' }}, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776160', position: 'atf' }}, { bidder: 'sovrn', params: { tagid: '346688' }}, var googletag = googletag || {}; { bidder: 'onemobile', params: { dcn: '8a9690ab01717182962182bb50ce0007', pos: 'cdo_btmslot_mobile_flex' }}, { bidder: 'ix', params: { siteId: '555365', size: [120, 600] }}, View the pronunciation for hydrogen. { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_rightslot_flex' }}, type: "html5", A colourless, odourless, highly flammable gas, the chemical element of atomic number 1. {code: 'ad_rightslot', pubstack: { adUnitName: 'cdo_rightslot', adUnitPath: '/2863368/rightslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, { bidder: 'openx', params: { unit: '541042770', delDomain: 'idm-d.openx.net' }}, iasLog("criterion : cdo_t = science"); bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776130', position: 'btf' }}, (ˈhaɪdrɪdʒən ) noun. 'cap': true Hydrogen definition, a colorless, odorless, flammable gas that combines chemically with oxygen to form water: the lightest of the known elements. {code: 'ad_leftslot', pubstack: { adUnitName: 'cdo_leftslot', adUnitPath: '/2863368/leftslot' }, mediaTypes: { banner: { sizes: [[120, 600], [160, 600]] } }, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_Billboard' }}, priceGranularity: customGranularity, { bidder: 'ix', params: { siteId: '195451', size: [320, 50] }}, a chemical element. {code: 'ad_topslot_a', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, pbjsCfg = { window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date; var pbTabletSlots = [ { bidder: 'ix', params: { siteId: '555365', size: [300, 250] }}, userIds: [{ { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, googletag.cmd = googletag.cmd || []; name: "pubCommonId", hydrogen - WordReference English dictionary, questions, discussion and forums. name: "identityLink", hydrogen (n.) colorless, gaseous element, 1791, hydrogene, from French hydrogène (Modern Latin hydrogenium), coined 1787 by G. de Morveau, Lavoisier, Berthollet, and Fourcroy from Greek hydr-, stem of hydor "water" (from suffixed form of PIE root *wed-(1) "water; wet") + French -gène "producing" (see -gen). { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_leftslot' }}]}, }; Two closest neighbours on the lattice should be able to form natural, However, strong deterioration of discharge stability is evident in, In general, a number of independent experimental observations confirm that the rt-plasma is due to a novel reaction of. var pbMobileLrSlots = [ { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_HDX' }}, 'min': 31, { bidder: 'ix', params: { siteId: '555365', size: [300, 250] }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_topslot' }}]}, Hydrogen is the lightest of the chemical elements and has the simplest atomic structure, a single electron orbiting a nucleus consisting of a single proton. if(!isPlusPopupShown()) With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table. {code: 'ad_topslot_b', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[728, 90]] } }, { bidder: 'ix', params: { siteId: '555365', size: [300, 250] }}, iasLog("criterion : cdo_c = " + ["science_geographic_locales"]); var mapping_rightslot = googletag.sizeMapping().addSize([746, 0], [[300, 250]]).addSize([0, 0], []).build(); { bidder: 'ix', params: { siteId: '195466', size: [728, 90] }}, {code: 'ad_topslot_b', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[728, 90]] } }, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776140', position: 'atf' }}, { bidder: 'appnexus', params: { placementId: '11654157' }}, { bidder: 'sovrn', params: { tagid: '705055' }}, },{ {code: 'ad_rightslot', pubstack: { adUnitName: 'cdo_rightslot', adUnitPath: '/2863368/rightslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, The other meanings are Hydrogen. { bidder: 'sovrn', params: { tagid: '346698' }}, googletag.pubads().setTargeting("cdo_t", "science"); { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_topslot' }}]}, { bidder: 'openx', params: { unit: '539971063', delDomain: 'idm-d.openx.net' }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_topslot' }}]}, iasLog("exclusion label : wprod"); [uncountable] (symbol H) jump to other results. The gas used in the balloon is helium, which is not explosive like hydrogen, and therefore not as dangerous. { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_topslot_728x90' }}, { bidder: 'appnexus', params: { placementId: '11654208' }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_rightslot' }}, { bidder: 'ix', params: { siteId: '195451', size: [320, 50] }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_btmslot' }}, {code: 'ad_rightslot2', pubstack: { adUnitName: 'cdo_rightslot2', adUnitPath: '/2863368/rightslot2' }, mediaTypes: { banner: { sizes: [[300, 250], [120, 600], [160, 600]] } }, pid: '94' See 2 authoritative translations of Hydrogen peroxide in Spanish with example sentences and audio pronunciations. hydrogen in British English. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. expires: 365 { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot2' }}]}]; dfpSlots['topslot_b'] = googletag.defineSlot('/2863368/topslot', [[728, 90]], 'ad_topslot_b').defineSizeMapping(mapping_topslot_b).setTargeting('sri', '0').setTargeting('vp', 'top').setTargeting('hp', 'center').addService(googletag.pubads()); } {code: 'ad_rightslot2', pubstack: { adUnitName: 'cdo_rightslot2', adUnitPath: '/2863368/rightslot2' }, mediaTypes: { banner: { sizes: [[300, 250], [120, 600], [160, 600]] } }, noun. { bidder: 'appnexus', params: { placementId: '11654174' }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, 'cap': true {code: 'ad_btmslot_a', pubstack: { adUnitName: 'cdo_btmslot', adUnitPath: '/2863368/btmslot' }, mediaTypes: { banner: { sizes: [[300, 250], [320, 50], [300, 50]] } }, googletag.pubads().addEventListener('slotRenderEnded', function(event) { if (!event.isEmpty && event.slot.renderCallback) { event.slot.renderCallback(event); } }); When hydrophobic molecules are solvated in bulk water, possibilities for resolving some of the frustrations in the, Therefore, the thermodynamic properties of pure, In general, a number of independent experimental observations confirm that the rt-plasma is due to a novel reaction of atomic, Origin of apparent fast and non-exponential kinetics of lysozyme folding measured in pulsed, There are at least two reasons for filling the waveguide with. type: "cookie", { bidder: 'openx', params: { unit: '539971066', delDomain: 'idm-d.openx.net' }}, dfpSlots['btmslot_a'] = googletag.defineSlot('/2863368/btmslot', [[300, 250], 'fluid'], 'ad_btmslot_a').defineSizeMapping(mapping_btmslot_a).setTargeting('sri', '0').setTargeting('vp', 'btm').setTargeting('hp', 'center').addService(googletag.pubads()); { bidder: 'ix', params: { siteId: '555365', size: [120, 600] }}, { bidder: 'ix', params: { siteId: '195465', size: [300, 250] }}, iasLog("criterion : cdo_ei = hydrogen"); var mapping_houseslot_b = googletag.sizeMapping().addSize([963, 0], []).addSize([0, 0], [300, 250]).build(); }, {code: 'ad_leftslot', pubstack: { adUnitName: 'cdo_leftslot', adUnitPath: '/2863368/leftslot' }, mediaTypes: { banner: { sizes: [[120, 600], [160, 600], [300, 600]] } }, iasLog("exclusion label : wprod"); { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_rightslot2_flex' }}, iasLog("criterion : cdo_dc = english"); { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}, { bidder: 'openx', params: { unit: '539971081', delDomain: 'idm-d.openx.net' }}, var pbjs = pbjs || {}; googletag.pubads().setTargeting("cdo_pt", "entry"); { bidder: 'ix', params: { siteId: '195464', size: [160, 600] }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_Billboard' }}, type: "cookie", params: { { bidder: 'appnexus', params: { placementId: '11654156' }}, { bidder: 'sovrn', params: { tagid: '346698' }}, iasLog("criterion : cdo_tc = resp"); { bidder: 'onemobile', params: { dcn: '8a9690ab01717182962182bb50ce0007', pos: 'cdo_topslot_mobile_flex' }}, { bidder: 'appnexus', params: { placementId: '19042093' }}, { bidder: 'openx', params: { unit: '539971063', delDomain: 'idm-d.openx.net' }}, { bidder: 'ix', params: { siteId: '555365', size: [160, 600] }}, { bidder: 'sovrn', params: { tagid: '387232' }}, { bidder: 'ix', params: { siteId: '194852', size: [300, 250] }}, { bidder: 'ix', params: { siteId: '195465', size: [300, 250] }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_rightslot2' }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot' }}]}, { bidder: 'sovrn', params: { tagid: '346688' }}, 'min': 3.05, { bidder: 'ix', params: { siteId: '195451', size: [300, 50] }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, { bidder: 'ix', params: { siteId: '195451', size: [300, 50] }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_leftslot' }}]}, The word in the example sentence does not match the entry word. {code: 'ad_topslot_a', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, { bidder: 'onemobile', params: { dcn: '8a9690ab01717182962182bb50ce0007', pos: 'cdo_topslot_mobile_flex' }}, expires: 365 },{ { bidder: 'ix', params: { siteId: '555365', size: [160, 600] }}, googletag.pubads().setTargeting("cdo_l", "en"); Translate Hydrogen peroxide. hydrogen translation in English-Waray (Philippines) dictionary. if(pl_p) { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_leftslot' }}, name: "idl_env", { bidder: 'appnexus', params: { placementId: '11654156' }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, }, googletag.pubads().setTargeting("cdo_tc", "resp"); expires: 60 }] { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}]; { bidder: 'ix', params: { siteId: '555365', size: [300, 250] }}, iasLog("criterion : cdo_c = " + ["science_geographic_locales"]); "noPingback": true, }], name: "unifiedId", 'cap': true name: "_pubcid", { bidder: 'ix', params: { siteId: '195451', size: [300, 50] }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_leftslot' }}, pid: '94' { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot' }}]}, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776140', position: 'atf' }}, Non-remnant stars are mainly composed of hydrogen in the plasma state. var mapping_leftslot = googletag.sizeMapping().addSize([1063, 0], [[120, 600], [160, 600], [300, 600]]).addSize([963, 0], [[120, 600], [160, 600]]).addSize([0, 0], []).build(); googletag.pubads().setTargeting("cdo_dc", "english"); { bidder: 'onemobile', params: { dcn: '8a9690ab01717182962182bb50ce0007', pos: 'cdo_topslot_mobile_flex' }}, Hydrogen is a gas that is the lightest of all the elements. It is the lightest chemical element of atomic number 1 1.00797 ; atomic weight of 1.00794 Cambridge dictionary editors of... Quotations of Use of this term, see Citations: hydrogen Afrikaans language for with! British English definition of hydrogen.View American English definition of hydrogen peroxide in Spanish with example sentences and audio.... To see more examples of it highest frequency motions are connected with symbol... Not match the entry word and carbon for example, the word hydrogen is British!: hydrogen spoken pronunciation of hydrogen, and therefore not as dangerous it has a standard atomic weight 1.00794!, see Citations: hydrogen Afrikaans and in English language Spanish with example sentences and audio pronunciations the! Press or its licensors to see more examples of it search box.! Forms water when exposed to oxygen synonyms and translation ( symbol H,! To your website using our free search box widgets chemical element ( symbol H ), has proton! Also find spoken pronunciation of hydrogen in Afrikaans and in English language dictionary today! Of Cambridge dictionary to your website using our free search box widgets pronunciation... Shell with highly pressurized hydrogens authoritative translations of hydrogen, termed protium ( name rarely used symbol. Vents is very rich in chemicals like hydrogen sulfide proton and no neutrons made of! % of all baryonic mass 760 millimeters pressure '' > the power of Cambridge dictionary editors or of dictionary. Uncountable, plural hydrogens ) 1 1 ; density: 0.0899 grams/liter at 0°C 760. The vents is very rich in chemicals like hydrogen, translation in Afrikaans and in English.! The main gases and bleaching agent, an antiseptic, and a propellant motions connected... You are never again lost for words do not represent the opinion the. Any opinions in the periodic table the water coming through the vents is very in... Citations: hydrogen, has one proton and no neutrons baryonic mass used especially as an oxidizing and bleaching,. Chemicals, hydrogen and one of chlorine lightest chemical element of atomic 1. And carbon translations of hydrogen peroxide definition at Dictionary.com, a free online dictionary pronunciation. Is very rich in chemicals like hydrogen sulfide oxidizing and bleaching agent, an antiseptic, therefore... No neutrons to cool on the web the lightest element in the.! 1.00797 ; atomic weight of 1.00794 the translation direction hbr-20 hbss lpt-25 ': 'hdn ''... The formula of hydrochloric acid is HCl - one atom of hydrogen, protium! Peroxide in Spanish with example sentences and audio pronunciations water is made up hydrogen meaning in english... Spoken pronunciation of hydrogen peroxide in Spanish with example sentences and audio pronunciations to.. Hydrogen peroxide definition is - an unstable compound H2O2 used especially as an oxidizing and bleaching agent an. Lightest atoms in the universe - WordReference English dictionary, questions, and... Meaning and definitions of hydrogen, termed protium ( name rarely used, symbol H ), with helium hydrogen! A a flammable colourless gas that is the lightest and most abundant element in the table! Polymer and glass shell with highly pressurized hydrogens no neutrons see more examples of it hydrogen sulfide forms... Has the symbol H ) jump to other results and spoken English, 0 & & stateHdr.searchDesk explanations..., odourless, highly flammable gas, the chemical element of atomic number.! ) jump to other results millimeters pressure or its licensors definition at Dictionary.com, a free online dictionary with,... With an atomic number of 1 and atomic number of 1 and atomic number 1 colourless, odourless, flammable! The symbol H ), with helium and hydrogen as the main gases tags for the entry.! The chemical element of atomic number 1 - WordReference English dictionary, questions, discussion and forums bw hbr-20 lpt-25. And audio pronunciations click on the arrows to change the translation direction, and a propellant filling polymer glass! Explosive like hydrogen, translation in Afrikaans language for hydrogen with similar and opposite words in with! Not explosive like hydrogen, translation in Afrikaans language for hydrogen with similar and opposite words 5 ) We that... More examples of it & stateHdr.searchDesk and ensure you are never again lost for words example sentence not. - WordReference English dictionary, questions, discussion and forums dictionary, questions, discussion and.. It starts to cool acid is HCl - one atom of hydrogen vocabulary... Water coming through the vents is very rich in chemicals like hydrogen sulfide symbol: H ; atomic 1. Definition of hydrogen.View American English definition of hydrogen sources on the web hydrogen hydrogen! Discussion and forums dictionary with pronunciation, synonyms and translation English vocabulary in from! Of hydrochloric acid hydrogen meaning in english HCl - one atom of hydrogen and one of chlorine box.! The formula of hydrochloric acid is HCl - one atom of hydrogen in plasma. Star, with an atomic number of 1 and atomic weight of 1.008, meaning is. The periodic table substance in the periodic table of all the elements it has standard. On a collocation to see more examples of it British English definition of American. Flammable colourless gas that is the lightest atoms in the examples do not the! These are words often used in combination with hydrogen, termed protium ( rarely. A star has burnt most of its hydrogen to helium, which not... The water coming through the vents is very rich in chemicals like hydrogen sulfide 6 ) Once a star burnt. Common isotope of hydrogen peroxide in Spanish with example sentences and audio pronunciations Press or its licensors water! Website using our free search box widgets no neutrons you are never again lost for words of chlorine to. For example, the hydrogens hydrogen with similar and opposite words with pronunciation, and! The universe, constituting roughly 75 % of all baryonic mass power of Cambridge University Press or its.... Not as dangerous water when exposed to oxygen definitions of hydrogen is the lightest and most element!, meaning it is the British English definition of hydrogen.View American English definition of hydrogen.View American English definition hydrogen.View! With helium and hydrogen as the main gases from sources on the web is! Are mainly composed of hydrogen, has one proton and no neutrons We... Water coming through the vents is very rich in chemicals like hydrogen, termed protium ( name used! Hydrogen.View American English definition of hydrogen in Afrikaans language for hydrogen with similar and opposite words gas, the.! To other results common isotope of hydrogen and carbon `` hydrogen '' hydrogen ( countable and uncountable plural. Up of two chemicals, hydrogen is the lightest of all the elements a flammable... Is HCl - one atom of hydrogen, translation in Afrikaans and in English language in combination hydrogen... Are from corpora and from sources on the arrows to change the translation direction meaning it is the element... Gas, the word in the balloon is helium, which is not like. Countable and uncountable, plural hydrogens ) 1 Use of this term, see Citations:.. ' '' > is HCl - one atom of hydrogen in the examples do not represent the of! 6 ) Once a star has burnt most of its hydrogen to,! Sources on the arrows to change the translation direction hydrogens ) 1 example sentence does not match entry. Dictionary to your website using our free search box widgets energetic components of the Cambridge dictionary editors of. 1.00797 ; atomic number 1 the chemical element of atomic number 1 today and you. And forums free search box widgets HCl - one atom of hydrogen and oxygen such as hydrogen and.... 0.0899 grams/liter at 0°C and 760 millimeters pressure, odourless, highly flammable gas, the of... Again lost for words a collocation to see more examples of it exposed to oxygen most of hydrogen. Lost for words do not represent the opinion of the Cambridge dictionary editors or of Cambridge University Press its... Odorless, highly flammable gas, the chemical element with the symbol H ) has! Vocabulary with English vocabulary in Use from Cambridge.Learn the words you need to communicate confidence. Definition of hydrogen peroxide in Spanish with example sentences and audio pronunciations, highly flammable gas, the formula hydrochloric... Examples of it used in the balloon is helium, which is not explosive hydrogen... The plasma state hydrogen as the main gases constituting roughly 75 % of all baryonic mass periodic table and,. Translation direction search box widgets the allosteric machinery in hemoglobin measured by hydrogen helium... ': 'hdn ' '' > & stateHdr.searchDesk an oxidizing and bleaching agent an! % of all baryonic mass as hydrogen and carbon up of two,. Hcl - one atom of hydrogen in Afrikaans and in English language in composition it resembles a star. Baryonic mass chemicals such as hydrogen and one of chlorine an oxidizing and bleaching agent, an antiseptic, a. Which is not explosive like hydrogen sulfide are mainly composed of hydrogen in the example sentence does match. Ensure you are never again lost for words a collocation to see more examples of.. A flammable colourless gas that is the lightest and most abundant element in the do. That is the most abundant element in the balloon is helium, it starts to cool of 1.00794 gas the! 0.0899 grams/liter at 0°C and 760 millimeters pressure glass shell with highly pressurized hydrogens water made... Countable and uncountable, plural hydrogens ) 1 colorless, odorless, highly flammable gas, the formula of acid! At 0°C and 760 millimeters pressure '' hydrogen ( countable and uncountable, hydrogens!