[DOC] [TLE] Gas-filled tube - Wikipedia [PAR] A gas-filled tube, also known as a discharge tube, is an arrangement of 
electrodes in a gas within an insulating, temperature-resistant envelope. Gas-
filled tubes exploit phenomena related to electric discharge in gases, ... Krypton 
can be used in fluorescent lamps instead of argon; in that application it reduces 
the total... [DOC] [TLE] Krypton - Wikipedia [PAR] Krypton is a chemical element with symbol Kr and atomic number 36. It is a 
member of group 18 (noble gases) elements. A colorless, odorless, tasteless 
noble gas, krypton occurs in trace amounts in the atmosphere and is often used 
with other rare gases in fluorescent lamps. .... Krypton gas is also combined with 
other gases to make luminous signs that... [DOC] [TLE] Noble Gases - body, used, Earth, life, chemical, form, energy ... [PAR] In fact, next to hydrogen, helium is the most abundant element in the universe. 
About 23 ... Krypton and radon have also been combined with fluorine to form 
simple compounds. ... By contrast, ordinary incandescent lightbulbs are filled with 
argon. ... Krypton can be used in incandescent lightbulbs and in fluorescent 
lamps. [DOC] [TLE] Krypton, Chemical Element - uses, elements, metal, gas, number ... [PAR] Three of those gaseskrypton, xenon, and neon, were discovered for the first 
time this way. The term noble gas refers to elements in Group 18 (VIIIA) of the 
periodic table. The periodic table is a ... All of them involve lighting systems in 
one way or another. ... The colder air becomes, the more gases within it turn into 
liquids. [DOC] [TLE] Krypton Element Facts - Chemicool [PAR] The chemical element krypton is classed as a noble gas and a nonmetal. .... idea 
that krypton and xenon may enter into combinations much more easily than ... 
Krypton is used as a filling gas for energy-saving fluorescent lights and as an 
inert... [DOC] [TLE] Neon and Argon Glow Lamps - How they work & History [PAR] The Neon lamp is a low pressure gas discharge lamp. ... + Argon + Hg 
combination used for outdoor use in order to function more ... Krypton - Whitish-
Green [DOC] [TLE] Fluorescent Lighting - HyperPhysics [PAR] The tube is filled with noble gases such as argon, neon or krypton to ... This is 
done in most fluorescent tubes by heating a filament in the end of the tube, which
... [DOC] [TLE] It's Elemental - The Element Krypton [PAR] The Element Krypton - Basic Physical and Historical Information. ... Small 
amounts of liquid krypton remained behind after the more volatile components ... 
Some fluorescent light bulbs are filled with a mixture of krypton and argon gases. 
Krypton gas is also combined with other gases to make luminous signs that glow 
with a... [DOC] [TLE] The Fluorescent Lamp - Gas Fillings [PAR] All fluorescent lamps are essentially high vacuum lamps, filled to a very low 
pressure ... but by far the most successful was the krypton-filled T8 lamp which 
acts as a ... One difficulty with Neon is its low atomic mass, which offers little 
protection... [DOC] [TLE] krypton facts, information, pictures | Encyclopedia.com articles about ... [PAR] Chemical Elements: From Carbon to Krypton .... Isotopes are two or more forms of 
an element. ... It can be combined with phosphors to produce materials that shine 
in the dark. ... A neon light filled with krypton, for example, glows yellow. [DOC] [TLE] Noble gases facts, information, pictures | Encyclopedia.com articles ... [PAR] The six noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon ... 
Since that time, numerous compounds of xenon with other elements, most 
notably ... bubble left over when nitrogen from the atmosphere was combined 
with oxygen. .... That first neon light was simply a glass tube filled with neon gas, 
which... [DOC] [TLE] Fluorescent Lighting Overview - Nemesis [PAR] A Fluorescent lighting system consists of two or three main components: (1) ... 
Gas discharge lighting is seen most frequently in "Neon

Question: Most fluorescent lights are filled with a combination of argon & this element, Kr
Answer: Krypton