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March 27, 2017

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please help.....i want to know the metals that have atomic mass less than50 with symbol and valency

  • chemistry - ,

    You need to learn how to look these things up on the periodic table. You want all of the elements from atomic number 1 (Hydrogen) up to and including atomic number 22 (titanium).
    http://www.webelements.com/

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