Metals

METALS


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VALENCY OF METALS


       The Number of electrons lost by a metal is known as the valency of the metal.For example:


  1. One atom of sodium loses 1 electron to form a positive sodium ion (Na+), so sodium is a metal

    Na           Na+      +      e-


    Here because an atom of sodium loses 1 electron so the valency of sodium metal is 1.

  2. In the same way, an atom of magnesium loses 2 electrons so its valency is 2.

    Mg           Mg2+      +      2e-


  3. Aluminium atom loses 3 electrons so its valency is 3.

    Al           Al3+      +      3e-





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