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9 elements that have the same number of protons as neutrons
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* elements that have *** same ****** ** ******* ** neutrons1 ********* protons20 *********** ******** protons16 *********** ********* protons14 *********** Magnesium12 ********* *********** ****** protons10 *********** Oxygen8 ******** *********** ******* ******** *********** Helium2 ******** *********** ********* ******** ************************