An isotope of radon; former name for 2 1 9 Rn. Also written as An. Half-life: 3.92 seconds. The actinides (the 14 elements excluding actinium, number 89) were also sometimes called actinons. →Related article Emanation Source : Heibonsha Encyclopedia About MyPedia Information |
ラドンの同位体,219Rnの旧称。Anとも表す。半減期3.92秒。アクチニド元素(アクチノイドから89番のアクチニウムを除いた14元素)をアクチノンと呼んだこともある。 →関連項目エマネーション 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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