5 neutrons - carbon-11, 7 neutrons - carbon-13, 6 neutrons - nitrogen-13, 8 neutrons - nitrogen-15, 30 neutrons - iron-56, 33 neutrons - cobalt-60, 34 neutrons - nickel-62, 35 neutrons - copper-64, 45 neutrons - selenium-79, 49 neutrons - krypton-85, 52 neutrons - strontium-90, 53 neutrons - zirconium-93,

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