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The difference in atomic numbers of the inert gas and alkali metal in the 5th period of the moden long form of periodic table isA. 17B. 20C. 12D. 16 |
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Answer» Correct Answer - A In V period Atomic no. of Alkali metral `= 37 (Rb)` and Atomic no. of xenon `= 54` `:. "Diff"^(n) = 54 - 37 = 17` |
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