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Radium-227 decays to a radon isotope.
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Radium-227 decays to a radon isotope.

User Janks
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Answer:

All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1600 years and decays into radon gas (specifically the isotope radon-222).

Step-by-step explanation:

All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1600 years and decays into radon gas (specifically the isotope radon-222).

User JosephStyons
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