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प्रश्न
Why do Helium, Neon and Argon have a zero valency?
टिप्पणी लिखिए
उत्तर
Helium has only K shell and it is completely filled with 2 electrons. Argon and neon have 8 electrons in their outermost shell which is the maximum number of electrons that can be accommodated in the outermost shell, hence their valency is zero.
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