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Which is the best predictor of the radioactive nature of an isotope?

User Dennis R
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The Neutron-to-Proton Ratio. Hope this helps Sorry if it's wrong I'm a little rusty on Physics.
User VenkateshDodda
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Answer:

The neutron-to-proton ratio of the atom.

Step-by-step explanation:

An isotope is an atoms of elements with the same number of protons, but different number of neutrons. Thus, the different values of their mass number.

The neutron-proton ratio could make an isotope either unstable, thus predicting the radioactive nature of the isotope.

User Harald Wellmann
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