Question

    Which of the following elements is a noble gas?

    A Oxygen (O) Correct Answer Incorrect Answer
    B Hydrogen (H) Correct Answer Incorrect Answer
    C Helium (He) Correct Answer Incorrect Answer
    D Carbon (C) Correct Answer Incorrect Answer

    Solution

    Helium is a noble gas, which is a group of elements known for their low reactivity due to their stable electron configurations. Noble gases are colorless, odorless, and have very low boiling points. Oxygen (O) is a non-metal element essential for life and is commonly found in the atmosphere. Hydrogen (H) is a non-metal element and the lightest element in the periodic table. It is not a noble gas. Carbon (C) is a non-metal element and is the basis of organic chemistry.

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