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6 October, 13:48

Which element is the most reactive? A. sodium B. nickel C. carbon D. oxygen

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  1. 6 October, 13:51
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    The most reactive elements lie in the first and second periods. They're highly reactive because they have only 1 or 2 valence electrons which are easily lost (easily in terms of energy needed to ionize them). The ionization energy must be the greatest to be the most reactive one. The element is A. sodium
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