The group with valency zero
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The group with valency zero is known as noble group.
Noble gases like krypton, argon, neon, xenon, helium and radon are noble gases and come under noble group.
Noble gases like krypton, argon, neon, xenon, helium and radon are noble gases and come under noble group.
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Answer: The answer to this question is group 18.
Explanation: Valency is defined as the measure of the combining power with other atoms when it forms a molecule of compound.
Valency of metals = number of electrons lost
Valency of non-metals = Number of electrons gained.
Noble gases have valency 0 because these elements cannot loose or gain electrons. The electrons are fully filled in the sub-shells of these elements. hence, the valency of these elements is 0. These elements belong to the last group of periodic table which is Group 18.
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