name all the noble gases
and tell that why don't they have any valency
sorry for my bad handwriting
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six noble gases
The six noble gases that occur naturally are helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).
Since noble gas has completely filled valence (outer) shells, they have the least reactivity. In other words, the noble gases are already stable in their elemental form and thus don't have the need to gain or lose electrons. So its valency is zero.
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so sorry I don't know it is so hard
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