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An isotope of francium -223 has a half-life of 22 minutes. If 90 kg of francium- 223 disintegrates o Constance Mcgowan 1 year ago Play Download
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The Rarest Element: Francium! 🔥 | Fun Facts in 60 Seconds#francium#trending#shorts #natural FactWorld English 1 year ago Play Download
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