A rare metallic element discovered by Berzelius in the mineral thorite, and subsequently found in small quantities in some other rare minerals…
| 单词 | θ68876 |
| 释义 | the world > matter > chemistry > elements and compounds > metals > specific elements > thorium > [noun] (5) thorium1832 A rare metallic element discovered by Berzelius in the mineral thorite, and subsequently found in small quantities in some other rare minerals… thorinum1836 The name given in France and England, for several years after 1828, to the metallic element thorium, n. radiothorium1905 an isotope of thorium (thorium-228) which occurs in small amounts in natural thorium and is formed by the beta decay of actinium-228, and which… Subcategories:— series of isotopes produced by the radioactive decay of (1) — final decay product of (1) |
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