钫的半衰期是二十二分钟。
鈁的半衰期是二十二分鐘。
phr. (chem.) The half-life period of francium is 22 minutes.
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Simplified stroke orders are based on the 'Standard of National Commonly-used Mandarin Chinese Characters (现代汉语通用字笔顺规范)', issued by the China National Language and Character Working Committee (国家语言文字工作委员会) on April 7th 1997. Traditional stroke orders are based on information issued by the Taiwan Ministry of Education.