Chapter3: Electronic Structure And The Periodic Law
Section: Chapter Questions
Problem 3.54E
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Question
Group 18 element (VIIIA) are known collectively as ____?
Expert Solution

Step 1 Group 8A
Group 8A of the periodic table are the noble gases or inert gases
Inert gases are : helium(He), neon (Ne), argon (Ar), Krypton(Kr), xenon (Xe) and Radon (Rn).
electronic configuration of He= 1s2
E.C of Ne = 2s2 2p6
E.C of Ar = 3s2 3p6
E.C of Kr =4s24p6
E.C of Xe = 5s2 5p6
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