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which element has 31 protons
which element has 32 protons in its nucleus
which element has 21 protons
which element has 32 protons
which element has 30 protons
which element has 11 protons
which element has 32 protons and 38 neutrons
which element has 33 protons
which element has 33 protons in its nucleus
which element has 11 protons in its nucleus
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