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Which one of the following does not increase while moving down the group of the periodic table:

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Which one of the following does not increase while moving down the group of the periodic table:

(a) Atomic radius

(b) Metallic character

(c) Valence electrons

(d) Shells in the atoms

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2 Answers

  1. The option that does not increase while moving down the group of the periodic table is (c) valence electrons.

    As we move down a group of the periodic table, the number of shells in the atoms increases. This is because new shells are added as we move from top to bottom. Therefore, option (d) is incorrect.

    The atomic radius also increases while moving down the group of the periodic table. This is because the number of shells increases, leading to an increase in the distance between the nucleus and the valence electrons. Therefore, option (a) is incorrect.

    The metallic character of elements also increases while moving down the group of the periodic table. This is because the valence electrons are farther away from the nucleus, which means that they are held less tightly and can be more easily shared with other atoms in a metallic bond. Therefore, option (b) is incorrect.

    However, the number of valence electrons in the outermost shell of an atom remains the same while moving down the group of the periodic table. This is because all the elements in a group have the same number of valence electrons, which is equal to the group number. Therefore, option (c) is the correct answer.