which lanthanide is radioactive in natur
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Explanation:
Only lanthanide which is radioactive is Pm (Promethium). All of its isotopes are radioactive. It is one of only two such elements that are followed in the periodic table by elements with stable forms, a distinction shared with technetium.
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Answer:
Promethium.
Explanation:
Only lanthanide which is radioactive is pm(promethium)
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