All atoms of an element have the same number of__But within the same element there may exist atoms that have__numbers of__.Atoms that have the same number of protons but different numbers of neutrons are called__.The neutrons are located in the__ along with protons. Isotopes can occur__or they may be__. All__are isotopes. Isotopes are written by using the__ of the element, followed by a__
and the s of the protons and neutrons.
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