Question

jackies uncle is undergoing radioactive iodine treatments for thyroid cancer. the radioactive iodine used by the doctor is an isotope of the element iodine. jackie researches the term isotope. which definition for the term does she learn? atoms of the same element with a negative charge atoms of the same element with a positive charge atoms of the same element with a different number of protons atoms of the same element with a different number of neutrons

Explanation:

Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons. Charge - related definitions (positive or negative charge) refer to ions, not isotopes. Atoms of the same element always have the same number of protons.

Answer:

atoms of the same element with a different number of neutrons