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Why lithium is harder than others …

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Why lithium is harder than others alkali metals?

    • Posted by Đęépaķ Deep 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 10 months ago

    Density increases as we go down the group and hardness decreases. Lithium is the lightest alkali metal and is harder than other alkali metals. As the number of shells increase, the attraction between the nucleus and the valence electrons decreases leading to a soft-weak structure that can be even cut by a knife.

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