英和和英

語源

Contraction of radium emanation, since the element appears in the radioactive decay of radium. By surface analysis, radio- +‎ -on (“suffix for noble gases”).

発音

• enPR: rā'dŏn, IPA: /ˈɹeɪdɒn/

名詞

radon (uncountable)

1. The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.
2. Radon-222 (22286Rn), the most stable isotope of said element.

使用する際の注意点

The isotopes Rn, Rn, and Rn were discovered independently, and were called radon (Rn), thoron (Tn), and actinon (An) respectively. In 1957, it was finally decided that the name radon should refer to the element in general, regardless of isotope. Thoron still survives as a name for Rn today; actinon is mostly obsolete, because Rn is short-lived.

同意語

下位語

派生語

関連する語

参考

• actinon
• radium emanation

参照

• Radon on the British Royal Society of Chemistry's online periodic table

アナグラム

• Ardon, Daron, rando, Andro, Ronda, Norad, NORAD, Doran, andro, Drona, andor, norad, Nador, and/or, Nardo, adorn, andro-

発音

• (Classical Latin) IPA: [ˈra.dɔn]
• (modern Italianate Ecclesiastical) IPA: [ˈraː.don]

名詞

radon n (genitive radī); second declension

1. radon

語形変化

Second-declension noun (neuter, Greek-type).