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16 March, 12:41

Is Actinium Metal, Non-Metal, or Semi-Metal?

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  1. 16 March, 12:56
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    Metal

    On the periodic table its atomic number is 89

    The Semi-metals aka the metalloids are atomic umbers 5,14,32,33,51,52, and 85

    The Metals are everything that is located to the left of the metalloids excluding Hydrogen (H) and Helium (He)

    Everything to the right of the metalloids are non-metals including Hydrogen (H) and Helium (He)
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