Assertion: technetium's isotope | /r/HasProperty | with half-life of 4.2 million years
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text: The most stable radioactive isotopes are technetium-98 with a half-life of 4.2 million years (Ma), technetium-97 (half-life: 2.6 Ma) and technetium-99 (half-life: 211,000 years).