第664回レアアースってなんなんだ byそんない理科の時間＠sonnaip

■オープニング・おしらせ　5/8配信お休み　PodcastMIXER・ニュースで聞く「レアアース」・レアアースは17種類の元素の総称・原子は原子核と電子、原子核は陽子と中性子・陽子の数と電子の数は基本同じ・電子の数や、い...

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第664回レアアースってなんなんだ byそんない理科の時間＠sonnaip

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