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What period is promethium (Pm) in?
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Oct 2, 2022
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What period is promethium (Pm) in?
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Ruty
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period: 6
block:f
atomic number:61
state at 20 degrees Celsius: solid
AFS
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Oct 3, 2022
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Answer:
6
Step-by-step explanation:
Tuergeist
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Oct 6, 2022
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