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Hydrogen is not a metal but it has been ...

Hydrogen is not a metal but it has been assigned a place in the metal reactivity series. Why?

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The reactivity of metals is measured with the tendency of the metal to lose their electrons. Since hydrogen also has a tendency of losing an electron and forming a positive ion, it has been assigned a place in the metal reactivity series.
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State reason for the following : (i) Non-metals cannot displace hydrogen from the acids. (ii) Hydrogen is not a metal, yet it is placed in the activity series of metals. (iii) Aluminium is more reactive than iron, yet its corrosion is less than that of iron.

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Knowledge Check

  • Among the alkali metals cesium is the most reactive because

    A
    its incomplete shell is nearest to the nucleus
    B
    it has a single electron in the valence shell
    C
    it is the heaviest alkali metal
    D
    the outermost electron is more loosely bound than the outermost electron of the other alkali metals.

  • Among the alkali metals cesium is the most reactive because

    A
    its incomplete shell is nearest to the nucleus
    B
    it has a single electron in the valence shell
    C
    it is the heaviest alkali metal
    D
    the outermost electron is more loosely bound than the outermost electron of the other alkali metals.

  • Hydrogen gas is not liberated when the following metal added to dill HCl

    A
    Mg
    B
    Sn
    C
    Ag
    D
    Zn

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