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    Chemistry
    Grade-9
    Easy

    Question

    Which among these is a halogen?

    1. Helium
    2. Chlorine
    3. Oxygen
    4. Neptune

    Hint:

    The second last group is the halogen.

    The correct answer is: Chlorine

      • In Mendeleev's periodic table there are 118 elements arranged in 18 groups and 7 periods.
      • The second last group is called halogen.
      • Chlorine is the halogen.

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