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physical object > natural object > particle > element > column grouped element > transition metal > inner transition metal > rare Earth > praseodymium
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praseodymium comparison table
Subject has ocean residence time has occurrence has ocean oxidation state is a kind of has group has synonym has image has filling orbital has definition has ocean concentration
rare Earth   inner transition metala column number in the table of the elementslanthanide 4fElement with atomic number between 57 and 71 in the top row of the inner-transition elements of the periodic table 
unclassified oceanic elementunknownocean oceanic element atom   unknown
praseodymiumunknownoceanIIIunclassified oceanic elementa column number in the table of the elementslanthanide4f unknown

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