radonとは意味・読み方・使い方

語源

Contraction of radium emanation, since the element appears in the radioactive decay of radium.

発音

• enPR: rā'dŏn, IPA^(key): /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. The most stable isotope of this element, ²²²₈₆Rn.

同意語

• emanation (廃れた用法) (definition 1)
• exradio (古風な用法) (definition 2)
• niton (廃れた用法) (definition 1)

使用する際の注意点

The isotopes ²²²Rn, ²²⁰Rn, and ²¹⁹Rn were discovered independently, and were called radon, thoron, and actinon respectively. In 1957, it was finally decided that the name radon should refer to the element in general, regardless of isotope.

派生語

• eka-radon
• radon difluoride
• radon fluoride

関連する語

• radium

参照

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

参考

• actinon
• radium emanation

アナグラム

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

Latin

発音

• (Classical) IPA^(key): /ˈra.don/, [ˈräd̪ɔn]
• (Ecclesiastical) IPA^(key): /ˈra.don/, [ˈräːd̪on]

名詞

radon n (genitive radī); second declension

1. radon

語形変化

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