Iodine has 37 known isotopes.  Therefore, the atomic mass has a range of 108-144 amu. Which of the following statements concerning iodine is correct? A) The isotopes of iodine have between 55 and 91 protons. B) An atom of iodine can have between 55 and 91 neutrons. C) The isotopes of iodine will always have the same number of neutrons, but the protons can vary. D) The isotopes of iodine have between 108 and 144 neutrons, but the number of protons will not vary.

Question

Iodine has 37 known isotopes.  Therefore, the atomic mass has a range of 108-144 amu. Which of the following statements concerning iodine is correct?

A) The isotopes of iodine have between 55 and 91 protons.

B) An atom of iodine can have between 55 and 91 neutrons.

C) The isotopes of iodine will always have the same number of neutrons, but the protons can vary.

D) The isotopes of iodine have between 108 and 144 neutrons, but the number of protons will not vary.

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