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Three elements P, Q and R have consecutive increasing atomic numbers. lf Q is a noble gas then which of the following is correct about P and R? (A) P and R belong to the same period of the periodic table. (B) P is a non-metal while R is a metal. (C) P and R belong to same group of the periodic table. (D) None of these |
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Answer» Correct option (B) P is a non-metal while R is a metal. Explanation: P, Q and R have consecutive increasing atomic numbers. As noble gases are present at the end of each period, P must be a non-metal of the same period and R must be a metal of the next period. |
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