Group 18 . 5 Argon Helium Krypton Neon Radon Xenon

Group 8A—Noble gases Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn) are gases of very low reactivity. Helium, neon, and argon don t combine with any other element krypton and xenon combine with very few. 

Gold, silver, and platinum are members of a class of metals called noble metals because they are relatively unreactive. (The term noble implies a class set apart.) Other elements that appear in nature in the uncombined state are the elements in Group 8 helium, neon, argon, krypton, xenon, and radon. 

Clues to the answer to this question may be found by considering a group of elements known as the noble (or inert) gases helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). Inert means inactive or idle , and describes the chemical reactivity of these elements. They are unreactive and for this reason are said to be chemically stable. He, Ne and Ar do not react with any other elements, whereas Kr and Xe react only with highly reactive fluorine. What is it that makes them so unwilling to react ... 

The Group 8A(18) elements are helium (He), the second most abundant element in the universe neon (Ne) argon (Ar) krypton (Kr) xenon (Xe) and radioactive radon (Rn). Only the last three form compounds [Group 8A(18) Family Portrait], The noble gases make up about 1% by volume of the atmosphere, primarily due to the abundance of Ar. 

Noble gases (Section 1 1) The elements in group VIIIA of the penodic table (helium neon argon krypton xenon radon)... 

RARE GAS. Any of the six gases composing the extreme right-hand group of the periodic table, namely helium, neon, argon, krypton, xenon, and radon. They are preferably called noble gases or (less accurately) inert gases. The first three have a valence of 0 and are truly inert, but the others can form compounds to a limited extent,... 

Helium, neon, argon, krypton, xenon and the radioactive element radon make up a most unusual group of non-metals, called the noble gases. They were all discovered after Mendeleev had published his periodic table. They were discovered between 1894 and 1900, mainly through the work of the British scientists Sir William Ramsay (Figure 9.16a) and Lord John William Strutt Rayleigh (Figure 9.16b). 

Noble gases The elements helium, neon, argon, krypton, xenon and radon. Family of inactive gases found in group 8A of the periodic table. 

Neon is a member of the noble gas family. Other elements in this family include helium, argon, krypton, xenon, and radon. These gases are in Group 18 (VIIIA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other. 

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