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    Question

    Which alkali metal has 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, with the symbol Li, has the atomic number 3. It is a soft, silvery-white alkali metal and the least dense metal under standard conditions.

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