why do noble gases glow?
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Now, why do Noble gases glow exactly? Well scientists believe that the Noble gases glow when a chemical current is passed through them because the outer energy levels are full they give out another energy level which results in the "neon" glow.
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All of the noble gases have full outer shells with eight electrons. ... At the top of the noble gases is little helium (He), with a shell that is full with only two electrons. The fact that their outer shells are full means they are quite happy and don't need to react with other elements.
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Noble gases have large positive electron gain enthalpies because the electron has to enter the next-higher principal quantum level leading to a very unstable electronic configuration.
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xenon and krypton(radioactive; can't say much) form most of the noble gas compounds so yeah in one way you can call them most reactive noble gases. Other noble gases take lots of effort (you can say) like temperature conditions and pressure to form compounds. How do noble gases exist in air?
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All noble gases are colorless and odorless. They also have low boiling points, explaining why they are all gases at room temperature.
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Under ordinary conditions, noble gases are inert and don't form compounds, but when ionized or under pressure, they will sometimes working into the matrix of another molecule or combine with highly reactive ions.
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Noble gases have large positive electron gain enthalpy. This is because the extra electron is placed in the next higher principal quantum energy levels. Thus, a highly unstable electronic configuration is produced.
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Noble gases are monoatomic, which means they exist as single atoms. This is because of their electronic stability. Unlike most common gases that exist as diatomic molecules like O2, N2, and Cl2, the noble gases exist as single atoms like He, Ne, Ar, i.e. they are monatomic molecules.
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Noble gases are very stable chemicals that do not react easily with other chemicals and are not flammable. ... These gases are not very toxic but they can be harmful in large amounts. Noble gases are asphyxiants. Asphyxiant gases replace oxygen in the air so there is less of it to breathe.
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The full valence electron shells of these atoms make noble gases extremely stable and unlikely to form chemical bonds because they have little tendency to gain or lose electrons. Although noble gases do not normally react with other elements to form compounds, there are some exceptions.
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Thus, emission spectra are produced by thin gases in which the atoms do not experience many collisions (because of the low density). The emission lines correspond to photons of discrete energies that are emitted when excited atomic states in the gas make transitions back to lower-lying levels.
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Because of their uber-high stability, the noble gases are relatively unreactive. They have very high ionization energies and negligible electronegativities because they have no desire to gain or lose an electron.
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The noble gases are present in the atmosphere in small amounts: 0.934% Argon. 0.0018% Neon. 0.00052% Helium.
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A noble gas is different from other elements because its highest electron energy level is completely filled. The examples of noble gases are helium, neon, Argon , krypton,Xenon , radon.
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They are unreactive because their atoms have stable arrangements of electrons. All noble gases have the maximum number of electrons in their outer shell; i.e. 2 electrons for helium and 8 for the other five.
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The noble gases make up about 1% of the earth's atmosphere in which their major component is argon. Smaller concentrations are occluded in igneous rocks, but the atmosphere is the principal commercial source of neon, argon, krypton, and xenon, which are obtained as by-products of the liquefaction and separation of air.
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The rare gases, also known as the noble gases or the inert gases, are a group of six gaseous elements found in small amounts in the atmosphere: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Collectively they make up about one percent of Earth's atmosphere.