Of the following pairs, the one containing examples of metalloid elements in the periodic table is :

  1. A

    Na and K

  2. B

    F and Cl

  3. C

    Cu and Ag

  4. D

    As and Sb

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    Solution:

    The substances that make up the stair-step line separating metals from non-metals are known as metalloids. This line is drawn between the borders of aluminium and boron, polonium, and astatine.
    Only Aluminum, which is categorised under Other Metals, is an exception to this.
    Therefore, metalloid elements As and Sb are.

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