Which element has stable isotopes with the largest ratio of neutrons to protons?

Name: Which element has stable isotopes with the largest ratio of neutrons to protons?
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Question

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Iodine (I) has stable isotopes with the largest ratio of neutrons to protons. Its most common stable isotope, iodine-127, has 74 neutrons and 53 protons, giving it a neutron-to-proton ratio of approximately 1.4. This ratio is larger than any stable isotopes of hydrogen (H), carbon (C), strontium (Sr), or calcium (Ca).

Which Element Has Stable Isotopes with the Largest Ratio of Neutrons