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Marsianer
 3 years ago
Best ResponseYou've already chosen the best response.0sodium 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 :) )

Safari321
 3 years ago
Best ResponseYou've already chosen the best response.1The 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.
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