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physical object > natural object > particle > element > metallic element > alkali earth metal > radium

radium comparison table

Subject	has ocean residence time	has occurrence	has ocean oxidation state	is a kind of	has hardness	has image	has definition	has ocean concentration
alkali earth metal				metallic element	malleable, extrudable and machinable		Element in the second column of the periodic table (from the left)
unclassified oceanic element	unknown	ocean		oceanic element				unknown
radium	unknown	ocean	II	unclassified oceanic element	malleable, extrudable and machinable			unknown

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