ヨウ素そ１３１ひゃくさんじゅういち

also: ようそひゃくさんじゅういち

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ひゃ

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Meanings

iodine-131

A radioactive isotope of iodine, commonly referenced in nuclear medicine and radiation safety contexts.

放ほう射しゃ性せいヨウ素そ
General term for radioactive iodine; ヨウ素１３１ specifically refers to the isotope with mass number 131.
セシウム１３７せしうむひゃくさんじゅうしち
Another radioactive isotope often mentioned together with iodine-131 in nuclear accident contexts.

ヨウ素そ１３１ひゃくさんじゅういち
Standard modern spelling using the katakana element name and Arabic numerals.
沃素一三一ようそひゃくさんじゅういち
Older spelling using the ateji kanji 沃素 and kanji numerals; now largely replaced by ヨウ素１３１.
ようそひゃくさんじゅういち

Compound of ヨウ素 (iodine) and １３１ (the mass number 131). The older form 沃素一三一 uses the ateji 沃素 for iodine and kanji numerals.