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francium |
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francium /fran·ci·um/ (Fr) (fran´se-um) a chemical element, at. no. 87.
francium (Fr) [fran′sē·əm] Etymology: France a metallic element of the alkali metal group. Its atomic number is 87, and the mass of its longest-lived isotope is 223. Formed from the decay of actinium, all of its 20 isotopes are radioactive and short-lived. francium a chemical element, atomic number 87, atomic weight 223, symbol Fr. See Table 6. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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