An isotope of iodine is I-126.how many protons, neutrons &electrons does it have
physics - drwls, Saturday, January 21, 2012 at 2:18am
126 is the total of protons and neutrons. For the number of protons, you should look up the atomic number of iodine. It is 53. The number of electrons is the same.
Subtract 53 from 126 for the number of neutrons.