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20 February, 19:50

Helium (He), oxygen (O), carbon (C), and selenium (Se) are all nonmetal. Using the periodic table, which pair of these nonmetal has the most similar properties

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  1. 20 February, 22:27
    0
    Oxygen and selenium helium and selenium oxygen and helium carbon and oxygen
  2. 20 February, 23:39
    0
    Oxygen and Selenium because they are in the same group/family so they have the most similar properties.
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