What makes alkali metals reactive?

I was just wondering why do alkali metals react with water.

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  • Anonymous
    1 decade ago
    Favorite Answer

    alkali metals are the series of elements in Group 1 ) of the periodic table Li, Na, K, Rb, Cs, Fr. They are all highly reactive and are rarely found in elemental form in nature.

    Alkali metals are famous for their vigorous reactions with water, and these reactions become increasingly violent as one moves down the group.

    ex:2K (s) + 2H2O (l) → 2KOH (aq) + H2 (g)

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  • 5 years ago

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  • Som™
    Lv 6
    1 decade ago

    Do not wonder.

    alkali metals have only i electron in their outer shell, thus having an incomplete octet.

    If they lose an electron they achieve octet configuration.

    Thus they are very reactive.

    On reacting with water they form respective hydroxides.

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    5 years ago

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  • Anonymous
    1 decade ago

    It is something to do with the fact they are right after the noble gases and therefore the energy jump from the unreactive nobles to the Group 1 alkali metals is quite high.

    It was either that or actually i think its because they only need to lose 1 electron to become a ion, meaning they require a very low ionization energy.

    Bah... dont listen to me. I had my Chem exam yesterday and I dont even remember this!

  • Anonymous
    5 years ago

    They have a single electron in their outer shell that would rather be bound to something else...for example, in water, the potassium or whatever ion would displace hydrogen in a highly exothermic reaction.

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