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25-04-2017
Chemistry

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the atoms of a certain element each contain 11 protons and 1 valence electron. Describe this element and its reactivity

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25-04-2017

It's Sodium or Na. If it only has 1 valence electron, it has to be in group 1. The only element in group 1 with the atomic number (number of protons) 11, is Sodium.

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