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    Question

    Which alkali metal is represented by the atomic number

    3?
    A Sodium Correct Answer Incorrect Answer
    B Lithium Correct Answer Incorrect Answer
    C Rubidium Correct Answer Incorrect Answer
    D Cesium Correct Answer Incorrect Answer

    Solution

    Lithium, represented by the atomic number 3, is the lightest of all metals and plays significant roles both in industrial applications and psychiatric medication.

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