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10th Class Science Periodic Classification of Elements Question Bank Periodic Classification of Elements

  • question_answer
    Which of the following statements are incorrect?
    I. The atomic radii increase along a period from left to right.
    II. In periodic table isotopes are given separate places.
    III. The oxides of metals are basic in nature.
    IV. Na, Mg and Al belong to the same period.
     

    A) I and IV only

    B) II and IV only

    C) I and II only

    D) III and IV only

    Correct Answer: C

    Solution :

    The atomic radii decrease along a period from left to right and isotopes are not given separate places in the periodic table as they have same atomic number.


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