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‘Also known as inert gases as their atoms dont 4, combine with other atoms in chemical reaction 5, , Came Ce ea), , , , , , , , , , , , @ ue to its flammability, we shifted to Helium, , Atomic Size =, Size increases as you go Helium, down the group Helium is used in ballons. Initially hydrogen was, , , , Electronic Configuration, , , , These elements have 8 electrons in valence, orbital which is considerd stable., , Krypton, , Light bulb containing krypton, 2 artrg Exception : Helium has two valence electri, , gas can produce a brig!, , white light useful for photo: General elect, , graphy and runaway lights. Porte, , Dene ene, Cee) ges by applying voltage., , , , , , , nS, , , , , , configuration, , , , Argon Reactivity of Xenon, Do 4) There are 22 known isotopes of, , yous argon ranging fram argon-31 to @ e000 act, , argon-51 and argon-53 PUt+XeFe mp PtFe + Xe, , XeFs+ MFs mi [XeFa]" [Fal, , , , as fluorinating agent, , , , Radon, , Radon is radioactive and can, , enter homes through basement e«, , after radioactive decay of rocks, , the earth. XeFa+MF om M+ iXeFal”, , , , non acts as fluorine donar, , , , belo