An inert gas with more than one orbit, has ____ electrons in its outermost shell.
A
0
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B
2
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C
4
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D
8
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Solution
The correct option is C 8 Helium = 2 ; Neon = 2,8 ; Argon = 2,8,8 ; Krypton =2,8,18,8 ; Xenon = 2,8,18,18,8 ; Radon=2,8,18,32,18,8. All have completely filled electrons with valence electron 8.