A rare metal, discovered by Mosander in 1841; found only in association with cerium and lanthanium. Symbol Di.
| 单词 | θ69182 |
| 释义 | the world > matter > chemistry > elements and compounds > metals > [noun] > unknown (4) didymium1842 A rare metal, discovered by Mosander in 1841; found only in association with cerium and lanthanium. Symbol Di. hydrogenium1868 Hydrogen regarded as a metal, and, as such, capable of being absorbed or occluded by certain metals. samarium1879 A hard grey metallic element of the lanthanide series, found in small quantities in monazite sand, samarskite, and other rare earth minerals. Symbol… actinium1881 A supposed chemical element, a metal claimed to have been discovered in 1881 in association with zinc. Obsolete. |
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