| 单词 | noble gas |
| 例句 | Finally, he left clues that led directly to the discovery of the group of elements known as the noble gases, some of which are so elusive that the last of them wasn’t found until 1962. A Short History of Nearly Everything 2003-05-06T00:00:00Z Included in that category is a work by Robert Barry in which he released different noble gases into the atmosphere at different places in California, taking a photograph of the empty canister and the gas. Haywards gallery's invisible show: 'the best exhibition you'll never see' 2012-05-18T16:16:52Z “I will roar argon into chlorine, xenon into fluorine, all the noble gases into reactive ones,” she writes. Books of The Times: Jessica Stern?s ?Denial? Returns to a Dark Past 2010-06-24T20:41:00Z I tried to convey chemistry topics by relating them to hip-hop, analogizing West- and East-coast hip-hop scenes to repellant noble gases. The gig economy goes to class 2017-06-03T04:00:00Z They also found that the ratio isotopes for a different noble gas, neon, matches the conditions believed to have existed on Earth when the planet was formed millions of years ago. Like a saggy balloon, Earth's core is leaking helium, a new analysis finds 2023-10-24T04:00:00Z The noble gas neon was first isolated by British chemists at the turn of the 20th century. Lovingly called the 'Gender Bender,' she makes neon art that's a 'megaphone' for trans activism 2023-08-22T04:00:00Z Figure 30.39 shows the energy levels of helium and neon, a pair of noble gases that work well together. College Physics for AP Courses 2015-08-12T00:00:00Z The noble gases do not form covalent bonds to other noble gas atoms because they already have a filled outer shell. Chemistry 2019-02-14T00:00:00Z An example is the noble gas helium which has 2 valence electrons in the first shell. An Introduction to Geology 2017-01-01T00:00:00Z Exports of noble gases, which Russia used to supply to Japan and other countries, will be allowed only with special state permission until Dec. 31, the Russian government said on May 30. Russia limits exports of noble gases, a key ingredient for making chips 2022-06-02T04:00:00Z Soon after, new techniques enabled the discovery of noble gases like argon and neon. Is science stuck? The "Great Stagnation Debate," explained 2021-11-26T05:00:00Z Poses special problems because its daughter is a radioactive noble gas. College Physics for AP Courses 2015-08-12T00:00:00Z The three heaviest noble gases react with fluorine to form fluorides. Chemistry 2019-02-14T00:00:00Z DAVINCI+ can help determine when Venus lost its water, thanks to its ability to sniff out the noble gases in its atmosphere, including, among others, xenon, argon and helium. NASA Just Broke the ‘Venus Curse’: Here’s What It Took 2021-08-17T04:00:00Z Russia accounts for 30% of the global supply of noble gases, according to the ministry's estimate. Russia limits exports of noble gases, a key ingredient for making chips 2022-06-02T04:00:00Z She will study noble gases in the samples to understand how solar radiation affects moon dust. 50 Years Ago, NASA Put a Car on the Moon 2021-07-27T04:00:00Z Neon is a noble gas renowned for its chemical stability. Opinion | Readers critique The Post: The atrocities in Tigray are horrific 2021-07-16T04:00:00Z The xenon fluorides are the best characterized as the starting materials for a few other noble gas compounds. Chemistry 2019-02-14T00:00:00Z More important, noble gases do not react with other geophysically relevant compounds, including carbon dioxide and water. NASA Just Broke the ‘Venus Curse’: Here’s What It Took 2021-08-17T04:00:00Z Ukraine was one of the world's largest suppliers of noble gases until it suspended production at its plants in the cities of Mariupol and Odesa in March. Russia limits exports of noble gases, a key ingredient for making chips 2022-06-02T04:00:00Z The Hong Kong government said it was watching the plant and asking officials in Guangdong for details after its French co-owner on Monday reported increased “noble gases” in the reactor. China says nuclear fuel rods damaged, no radiation leak 2021-06-15T04:00:00Z Maybe it would be better to just say short-lived, rather than inappropriately choosing a monovalent noble gas and saying the opposite of what was intended. Opinion | Readers critique The Post: The atrocities in Tigray are horrific 2021-07-16T04:00:00Z These are similar in concept to the stable electron shells observed for the noble gases. Chemistry 2019-02-14T00:00:00Z Concentrations of krypton, argon, neon and xenon — the noble gases that do not react with other elements — may provide hints about how Venus and its atmosphere formed. New NASA Missions Will Study Venus, a World Overlooked for Decades 2021-06-02T04:00:00Z DAVINCI+ can help determine when Venus lost its water, thanks to its ability to sniff out the so-called noble gases in its atmosphere, including, among others, xenon, argon and helium. Is NASA about to Lift the ‘Venus Curse?’ 2021-06-02T04:00:00Z The noble gas is difficult to obtain in large quantities owing to the energy-intensive process needed to extract it from the air and because of competing demand from electronics, lighting and space industries. Last Chance for WIMPs: Physicists Launch All-Out Hunt for Dark-Matter Candidate 2020-10-08T04:00:00Z The noble gas is difficult to obtain in large quantities owing to the energy-intensive process needed to extract it from the air and because of competing demand from electronics, lighting andspace industries. Last chance for WIMPs: physicists launch all-out hunt for dark-matter candidate 2020-10-01T04:00:00Z Hypervalent molecules have a central atom that has more electrons than needed for a noble gas configuration. Chemistry 2019-02-14T00:00:00Z An alpha particle is a nucleus of helium, a noble gas. Halogen nightmares 2020-09-01T04:00:00Z Like this pair, several versions of other noble gases reside in a planet’s atmosphere. Is NASA about to Lift the ‘Venus Curse?’ 2021-06-02T04:00:00Z Pervasive atmospheric contamination of samples derived from Earth’s mantle poses a formidable challenge to anyone investigating the origins and transport of volatile species, such as nitrogen and the noble gases, in the deep Earth. Nitrogen variations in the mantle might have survived since Earth’s formation 2020-04-14T04:00:00Z Scientists are hunting through macrofossils, leaf wax, mineral types, noble gases, and much more to answer questions about what Greenland’s ancient landscape looked like when it was last exposed. Ancient soil from secret Greenland base suggests Earth could lose a lot of ice 2019-10-29T04:00:00Z With the exception of most of the noble gases, all nonmetals form compounds with oxygen, yielding covalent oxides. Chemistry 2019-02-14T00:00:00Z Helium, the second element in the periodic table, is of no use whatsoever—impossibly inert, a snooty “noble gas” that refuses to bond to anything, not even to itself. Why Carbon? 2019-10-22T04:00:00Z Importantly, noble gases do not react with other geophysically relevant compounds, including carbon dioxide and water. Is NASA about to Lift the ‘Venus Curse?’ 2021-06-02T04:00:00Z Uranium can also break down into other radioactive materials, like radium — and it can release the noble gas radon, which can cause lung cancer in large concentrations. That uranium ore found at a Grand Canyon museum isn’t as scary as it sounds 2019-02-19T05:00:00Z Similarly, although element 118 falls into the noble gas column, theory predicts that it will readily attract electrons—something no other noble gas does. A storied Russian lab is trying to push the periodic table past its limits—and uncover exotic new elements 2019-01-30T05:00:00Z Fluorine is the only element that reacts directly with the noble gas xenon. Chemistry 2019-02-14T00:00:00Z These noble gases, trapped inside the hibonites for more than 4.5 billion years, provide clues to the young sun’s violent behavior. The Young Sun’s Outbursts Were Trapped in Blue Crystals From Outer Space 2018-07-30T04:00:00Z The mass spectrometer was specifically designed to look for traces of noble gases, such as helium and neon. Blue Meteorite Crystals Reveal the Sun's Wild Youth 2018-07-31T04:00:00Z Which is ironic, as that institution was home to scientists who discovered five noble gases. A Book That Bills Itself as "the Definitive Field Guide to Animal Flatulence" 2018-06-05T04:00:00Z Oganesson is classified as a noble gas, but the findings suggest that it may behave differently from other members of its group and may even be solid at room temperature. Heaviest known element has electrons that break the mould 2018-02-05T05:00:00Z Moreover, they are noble gases and are not incorporated into plant and animal matter in the food chain. Chemistry 2019-02-14T00:00:00Z We still do not understand how it works, or why so many structurally unrelated chemicals – diethyl ether, chloroform, halothane, isoflurane, and even the inert noble gas xenon – all knock out animals equally well. Plants, Like People, Succumb to Anesthesia [Video] 2018-01-28T05:00:00Z In contrast, neon and helium are noble gases, meaning they virtually never react with other chemicals. Blue Meteorite Crystals Reveal the Sun's Wild Youth 2018-07-31T04:00:00Z Determination of halogen abundances in terrestrial and extraterrestrial samples by the analysis of noble gases produced by neutron irradiation. Halogens in chondritic meteorites and terrestrial accretion 2017-11-28T05:00:00Z The largest such detectors now contain more than three tonnes of the noble gases, but according to the roadmap they need to be ten times larger. Europe sets priorities for hunting cosmic particles 2017-11-15T05:00:00Z Following hydrogen is the noble gas helium, which has an atomic number of 2. Chemistry 2019-02-14T00:00:00Z Even the small amount of radioactivity vented into the atmosphere was in the form of noble gas, which DeSantis says doesn’t affect the food chain and can be breathed and expelled by humans. Three Mile Island accident changed his entire life 2017-03-11T05:00:00Z For example, they want to measure the planet’s inventory of stable noble gases, such as xenon and krypton, which change little in abundance over billions of years and hold clues to planetary origins. Venus can wait: Jilted scientists face years without NASA return to Earth’s neighbor 2017-01-11T05:00:00Z Marty, B. The origins and concentrations of water, carbon, nitrogen and noble gases on Earth. Halogens in chondritic meteorites and terrestrial accretion 2017-11-28T05:00:00Z When noble gases are excited, they give off a flash of light that we can watch for. Dark matter: What's the matter? : Nature : Nature Research 2016-09-27T04:00:00Z Note that noble gases are excluded from this figure because these atoms usually do not share electrons with others atoms since they have a full valence shell. Chemistry 2019-02-14T00:00:00Z There is no reason that a major character couldn’t be shaped like a lamprey, visible only in infrared, or a cloud of noble gas, but I suppose casting agents might object. A Surprising “Star Trek” Reboot 2016-07-22T04:00:00Z US aircraft designed to detect evidence of a nuclear test, such as radioactive particulate matter and blast-related noble gases, could be deployed from a base on the Japanese island of Okinawa. North Korea nuclear test: Britain urges Seoul to show restraint 2016-01-07T05:00:00Z Kendrick, M. A. High precision Cl, Br and I determinations in mineral standards using the noble gas method. Halogens in chondritic meteorites and terrestrial accretion 2017-11-28T05:00:00Z The noble gases are the shy guys of the atomic world—the electron shells around these atoms are filled, so they are chemically inert and do not usually exchange or share electrons with their neighbors. Saturn's Core Might Be Cloaked in a Neon Shield 2015-06-18T04:00:00Z Electron-deficient molecules have a central atom that has fewer electrons than needed for a noble gas configuration. Chemistry 2019-02-14T00:00:00Z As a noble gas, it’s almost totally inactive. Coravin: Greg Lambrecht's Corker of a Wine Idea 2014-09-25T04:00:00Z The researchers used noble gases to trace the path of methane as these inert chemicals are not affected by microbial activity or oxidation. US gas leaks not caused by fracking 2014-09-15T04:00:00Z It follows concerns that athletes were breathing these so-called noble gases to encourage the growth of red blood cells that boost stamina. Xenon and argon banned for athletes 2014-08-31T04:00:00Z This is quite different than that other radioactive noble gas that always gets discussed – radon-222. EPA Hits Nuclear Power With Kryptonite 2014-06-13T04:00:00Z At higher temperatures, boron reacts with all nonmetals, except tellurium and the noble gases, and with nearly all metals; it oxidizes to B2O3 when heated with concentrated nitric or sulfuric acid. Chemistry 2019-02-14T00:00:00Z As useful as extracted, processed and packaged helium is to researchers in the lab, the true value of this noble gas for Earth scientists lies in the ground. Helium high 2014-02-19T18:50:03.680Z Even noble gases like xenon, which rarely interact with other atoms, intertwine with hydrogen to form novel, complex structures. The Big Squeeze 2013-12-16T22:28:17Z In that chart, helium is placed above the alkaline earth elements, contrary to its usual position as a member of the noble gases family in conventional tables. Readers Respond to "Quantum Weirdness" 2013-09-21T11:15:00.690Z Soon, however, chemists found several other completely unreactive gaseous elements, and eventually “argon and its companions” found a place in the periodic system—they are the noble gases. The Quest to Put the Elements in Their Places 2013-01-10T18:15:00.280Z When atoms of nonmetal elements form ions, they generally gain enough electrons to give them the same number of electrons as an atom of the next noble gas in the periodic table. Chemistry 2019-02-14T00:00:00Z Our atmosphere contains far less xenon, relative to the lighter noble gases, than meteorites similiar to the rocky material that formed the Earth. The Mysterious Case of the Missing Noble Gas 2012-10-11T17:15:01.623Z Argon, a noble gas, tends to remain trapped in the crystal matrix of minerals. Planetary science: The time machine 2012-07-25T17:20:40.527Z Nevertheless, in the case of Fukushima, the USS Ronald Reagan aircraft carrier sailed into the plume of escaping radioactive noble gases on March 12. It's Not Just Fukushima: Mass Disaster Evacuations Challenge Planners 2012-03-01T19:45:00.230Z Ms. Hively says she was amused to discover what sorts of stores bother with noble gases and glass tubes. City Room: Bright, Blinking Beacons That Are Still Easily Missed 2011-09-22T11:05:50Z It has the same number of electrons as atoms of the next noble gas, krypton, and is symbolized Br−. Chemistry 2019-02-14T00:00:00Z As a result, some chemists suggested that the noble gases did not even belong in the periodic table. The Evolution of the Periodic System 2011-01-21T23:45:05.210Z In other words, the noble gases of the atmosphere are isotopically heavier than those of the sun. Subsurface Gas Deposit Could Deflate Theory of How Earth's Atmosphere Formed 2011-01-10T07:45:41.173Z We hope to prepare adhesive joints in which a noble gas acts as an adhesive. The Practical Values of Space Exploration Report of the Committee on Science and Astronautics, U.S. House of Representatives, Eighty-Sixth Congress, Second Session Nevertheless, the whole group of six noble gases, from helium to emanium, were discovered and fitted into the periodic system at a place where nobody had suspected a gap. A Book of Exposition A magnesium atom must lose two electrons to have the same number electrons as an atom of the previous noble gas, neon. Chemistry 2019-02-14T00:00:00Z These elements had not been predicted by Mendeleev or anyone else, and only after six years of intense effort could chemists and physicists successfully incorporate the noble gases into the table. The Evolution of the Periodic System 2011-01-21T23:45:05.210Z "We don't see any solar noble gas in the mantle," he says. Subsurface Gas Deposit Could Deflate Theory of How Earth's Atmosphere Formed 2011-01-10T07:45:41.173Z The charges of cations formed by the representative metals may be determined readily because, with few exceptions, the electronic structures of these ions have either a noble gas configuration or a completely filled electron shell. Chemistry 2019-02-14T00:00:00Z This trend is demonstrated by the data for a series of noble gases shown in Figure 9.34. Chemistry 2019-02-14T00:00:00Z A nitrogen atom must gain three electrons to have the same number of electrons as an atom of the following noble gas, neon. Chemistry 2019-02-14T00:00:00Z Bohr’s model of the atom also served to explain why the noble gases lack reactivity: noble gases possess full outer shells of electrons, making them unusually stable and unlikely to form compounds. The Evolution of the Periodic System 2011-01-21T23:45:05.210Z But the trace noble gases inside the Bravo Dome field do not reflect a solar origin. Subsurface Gas Deposit Could Deflate Theory of How Earth's Atmosphere Formed 2011-01-10T07:45:41.173Z Atoms of many main-group metals lose enough electrons to leave them with the same number of electrons as an atom of the preceding noble gas. Chemistry 2019-02-14T00:00:00Z It has the same number of electrons as atoms of the preceding noble gas, argon, and is symbolized Ca2+. Chemistry 2019-02-14T00:00:00Z This allows each halogen atom to have a noble gas electron configuration. Chemistry 2019-02-14T00:00:00Z Why do the boiling points of the noble gases increase in the order He < Ne < Ar < Kr < Xe? Chemistry 2019-02-14T00:00:00Z The oxides of halogens, at least one of the noble gases, and metals with higher reduction potentials than copper do not form by the direct action of the elements with oxygen. Chemistry 2019-02-14T00:00:00Z The boiling points and melting points of the noble gases are extremely low relative to those of other substances of comparable atomic or molecular masses. Chemistry 2019-02-14T00:00:00Z |
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