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So little is known about it, because there is only about 1 ATOM OF FRANCIUM IN A CUBIC FOOT OF URANIUM ORE!

对它所知甚少,因为在1立矿石中,仅有1个钫原子!

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HFPPV, HFR, HFRS, HFS, HFSS, HFSV, HFU, HFV, HFW, HFX,

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3G, 401(K), a,

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趣味化学:Periodic Videos

A lump of Plutonium, which is very radioactive, is really quite warm to touch. And francium, which I think is more radioactive, is probably very warm.

射性很强的钚,起来真的很暖和。我射性更强的钫可能非常暖和。

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H-hour, HHPA, HHPC, HHPS, HHR, HHS, HHT, HHV, HHW, hi,

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3G, 401(K), a,
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