Francium

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Information @ a Glance

  • Francium is a radioactive chemical element which is classified among the alkaline earth metals on the periodic table.
  • It is identified with the symbol Fr and it has an atomic number of 87.
  • It is a heavy, unstable, radioactive metal with a maximum half-life of only 22 minutes. It occurs naturally to a very limited extent in uranium minerals.
  • It has a low melting point and, if enough of it could be accumulated, it would be liquid in a warm room.
  • Francium isotopes are obtained after thorium or uranium targets bombarding by high-energy protons.
  • Francium is the second rarest element in the crust, after astatine.
  • Franciumís isotopes, with mass numbers ranging from 200 to 232, most commonly undergo alpha- or beta-decay and the Francium-223 is the elementís longest lived isotope.
  • It can emit an alpha-particle to form astatine-219 or a beta-particle to form radium-223.
  • Francium is produced by Uranium and thorium minerals and is in vanishingly small quantities via their natural radioisotope decay chains.

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