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22 February, 08:31

Use the periodic table to predict which element is nonmetallic AND a gas at room temperature.

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  1. 22 February, 11:42
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    The 13 elements that are room temperature gases are radon (Rn), xenon (Xe), krypton (Kr), argon (Ar), chlorine (Cl), neon (Ne), fluorine (F), oxygen (O), nitrogen (N), helium (He) and hydrogen (H). Most non-metals in the periodic table have a gaseous elemental form.
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