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5 May, 09:57

The elememt sodium (Na) is a?

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  1. 5 May, 10:03
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    The atomic number is 11

    It is characterized as an alkali metal

    it has 11 electrons & protons

    the atomic mass unit is 22.99
  2. 5 May, 10:15
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    It is a very reactive metal with 11 protons, 12 neutrons, 11 electrons, and 1 valence electron
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