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Francium is a natural chemical element but the total quantity of francium in the earth crust is only approx. 30 g. Francium has ca. 40 isotopes and isomers but only two are natural: 221Fr (in the neptunium decay chain series) and 223Fr (in the actinium decay chain series). Artificially preparation of francium isotopes is also extremely difficult and expensive; and the chemistry and physics of isotopes was developed essentially after 1940. Supplementary, the most stable isotope of francium has a half life of only 21,8 minutes and is strongly radioactive; the half lives of the artificially prepared isotopes are more smaller.
This is sufficient reason to explain why francium was later discovered and why even today is only slightly studied.
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5 hours
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Lon Stratton's birth name is Lon Allen Stratton.
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Lon Haber's birth name is Lon Jason Haber.
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Lon Bronson's birth name is Lon Drew Bronson.
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to get to lon lon ranch first start out in Hyrule town then go out the right exit go straight and you will find a fence follow it down and you will find an opening go through it welcome to lon lon ranch
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Lon Satton was born in 1929.
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