单词 | protactinium |
释义 | protactinium (once / 5909656 pages) n WORD FAMILY protactinium USAGE EXAMPLESBut thorium gloms on to particles more readily than protactinium. Science Magazine(Jun 30, 2016) Are there planets where the inhabitants proudly display pendants of niobium and bracelets of protactinium, while gold is a laboratory curiosity? Carl Sagan, Cosmos(1980) Even the least popular, protactinium, has garnered over 12,000 views. Science Magazine(May 26, 2011) n a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead Syn|Hyper Pa, atomic number 91, protoactinium metal, metallic element any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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