the radon isotope with atomic weight 222, which is the first product of the alpha decay of radium-226; cf. emanation, n. 2c.
| 单词 | θ79559 |
| 释义 | the world > matter > physics > atomic nucleus > radioactive isotope > specific isotopes > [noun] > radium > radon (3) radium emanation1901 the radon isotope with atomic weight 222, which is the first product of the alpha decay of radium-226; cf. emanation, n. 2c. thoron1918 A radioactive isotope of radon, atomic weight 220, that is a gaseous decay product of thorium, being formed by the decay of radium 224; thorium… Subcategories:— mixture (1) |
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