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    Chemistry
    Grade-9
    Easy

    Question

    How many elements are in the Noble Gas family are man-made?

    1. 3
    2. 2
    3. 1
    4. 0

    Hint:

    Six noble gases are naturally occuring.

    The correct answer is: 1

      • There are 7 elements in noble gas family.
      • Six noble gases are naturally occurring helium, neon, argon, xenon, krypton and radon. Radon is highly reactive.
      • Oganesson is man made noble gas. 

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