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element with 5 protons and 4 neutrons
element with 4 protons and 4 neutrons
element with 3 protons and 4 neutrons
element with 5 protons
element with 6 protons and 7 neutrons
element with 5 neutrons
element with 6 protons and 8 neutrons
element with 6 protons and 6 neutrons
element with 7 protons and 8 neutrons
what has 5 protons and 6 neutrons
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