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Which lanthanide element and which transition element have only radioactive isotopes? (This situation is indic?
Which lanthanide element and which transition element have only radioactive isotopes? (This situation is indicated on most periodic tables by parentheses around the mass of the element.)
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- steve_geo1Lv 71 decade agoFavorite Answer
Promethium (Pm) amongf the lanthanides and technetium (Tc) among the transition metals.
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