出典:Wiktionary
出典:『Wiktionary』 (2026/04/24 23:21 UTC 版)
| Chemical element |
|---|
| Po Atomic number 84 polonium |
| Previous: ← bismuth (Bi) |
| Next: astatine (At) → |
| English Wikipedia article on Polonium |
From New Latin polonium, from Medieval Latin Polonia (“Poland”), named after Marie Curie's homeland.
polonium (usually uncountable, plural poloniums)
| Chemical element |
|---|
| Po Atomic number 84 polonium |
| Previous: ← bisemutum (Bi) |
| Next: astatium (At) → |
From Polonia + -ium.
出典:Wikipedia
出典:『Wikipedia』 (2011/08/07 10:58 UTC 版)
Polonium (
/pɵˈloʊniəm/ po-loh-nee-əm) is a chemical element with the symbol Po and atomic number 84, discovered in 1898 by Marie Skłodowska-Curie and Pierre Curie. A rare and highly radioactive element, polonium is chemically similar to bismuth and tellurium, and it occurs in uranium ores. Polonium has been studied for possible use in heating spacecraft. As it is unstable, all isotopes of polonium are radioactive. There is disagreement as to whether polonium is a post-transition metal or metalloid.