英语词汇“potassium-40”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	potassium-40
释义	potassium-40 potassium-40 [pə′tas·ē·əm ¦fȯr·dē] (nuclear physics) A radioactive isotope of potassium having a mass number of 40, a half-life of approximately 1.31 × 10⁹ years, and an atomic abundance of 0.000122 gram per gram of potassium. potassium-40 potassium-40 n. A naturally occurring beta-emitting radioactive isotope of potassium having a half-life of 1.3 billion years; it is the chief source of natural radioactivity of living tissue.
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