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Words Kanji Guides About

トリウム系けい列れつ

ト

リ

ウ

ム

け

い

れ

つ

Meanings

1

noun

thorium series

chemistry

In nuclear chemistry, the radioactive decay chain starting from thorium-232 and ending with lead-208.

トリウム系けい列れつは、天てん然ねんに存そん在ざいする放ほう射しゃ性せい壊かい変へん系けい列れつの一ひとつです。
The thorium series is one of the naturally occurring radioactive decay series.

Kanji

系lineage, system
列file, row, rank

Similar words

ウラン系けい列れつ
The uranium series starts from uranium-238, while the thorium series starts from thorium-232.
アクチニウム系けい列れつ
The actinium series starts from uranium-235, another natural decay chain.

Etymology

Compound of トリウム (thorium) and 系列 (series, lineage). The term is a direct calque from English 'thorium series', used in nuclear chemistry.