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5 August, 05:34

What is an alkali metal with fewer than 10 protons in its nucleus?

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  1. 5 August, 07:02
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    Lithium

    Explanation:

    Alkali metals are group of metals which are present in first group of periodic table. As we know atomic number is equal to number of protons contained by a particular element. Therefore, the alkali metals along with there number of protons are listed below;

    Alkali Metal Number of Protons

    Lithium 3

    Sodium 11

    Potassium 19

    Rubidium 37

    Cesium 55

    Francium 87

    Hence, it is cleared from above table that Lithium is having fewer protons than 10.
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