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22 March, 22:08

Using the periodic tables, identify the heaviest member of each of the following groups:

(a) alkali metals

(b) chalcogens

(c) noble gases

(d) alkaline earth metals

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  1. 22 March, 22:11
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    (a) Alkali metals: Francium (Fr)

    (b) Chalcogens: Polonium (Po)

    (c) Noble gases: Radon (Rn)

    (d) Alkaline earth metals: Radium (Ra)

    Explanation:

    In the periodic table, the atomic mass increases down the group. Therefore, the last element of a group is the heaviest element of the group.

    (a) alkali metals: The chemical elements that are present in group 1 of the periodic table, except hydrogen.

    The heaviest member of this group is francium (Fr)

    (b) chalcogens: The chemical elements that are present in group 16 of the periodic table

    The heaviest member of this group is polonium (Po)

    (c) noble gases: The chemical elements that are present in group 18 of the periodic table

    The heaviest member of this group is radon (Rn)

    (d) alkaline earth metals: The chemical elements that are present in group 2 of the periodic table.

    The heaviest member of this group is radium (Ra)
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