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Marsianer Group TitleBest ResponseYou've already chosen the best response.0
sodium is number 11 in the periodic table, so it contains 11 protons. (the periodic table is ordered in number of protons in one atom of the material, so with a look on the table you can easily find any proton number of any element :) )
 2 years ago

Safari321 Group TitleBest ResponseYou've already chosen the best response.1
The number of protons in an atom is different for every element. If you look at the periodic table, then the number labeled "atomic number" is the number of protons.
 2 years ago
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