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element with 18 protons
element with 18 protons and 22 neutrons
element with 28 protons
element with 19 protons
element with 118 protons
element with 16 protons
element with 19 protons and 20 neutrons
element with 17 protons
element with 16 protons 16 neutrons
element with 28 protons and 30 neutrons
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