最終更新日：2023/09/02
Rubidium is a soft, silvery-white metallic element of the alkali metal group.
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Rubidium is a soft, silvery-white metallic element of the alkali metal group.
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Rubidium is a soft, silvery-white metallic element of the alkali metal group.
Rubidium is a soft, silvery-white metallic element of the alkali metal group.
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