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Which of the following elements A, B, C, D and E with atomic number 3, 11, 15, 18 and 19 respectively belong to the same group?
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Important Questions on Classification of Elements and Periodicity in Properties
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Element A belongs to Group VII in p-block and element B belongs to Group I in s-block of the periodic table. Out of the following assumptions, the correct one is_____.
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The element with atomic number is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
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Which of the following properties do not match elements of halogen family?
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Which fact is not valid for Dobereiner's triads?
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Which of the following statements is incorrect from the point of view of modern periodic table?
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The elements are expressed in terms of their atomic numbers. Which of the following group of elements belongs to alkali metals?
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Which of the following elements will form acidic oxide?
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Which one of the following is most electropositive element?
