atomic number 89


  • WordNet 3.6
    • n atomic number 89 a radioactive element of the actinide series; found in uranium ores
    • ***


In science:

For non lone pair candidates, we chose Tl which has an atomic number (81) close to that of Bi and a small radius (89 pm), and Y which has a much smaller atomic number (39) but an intermediate radius (104 pm).
Non collinear magnetism and single ion anisotropy in multiferroic perovskites