• mass
  • Its atomic mass is 91.224. (wikipedia.org)
  • A single atom (a second was reported but was found to have been based on data fabricated by Ninov) of copernicium was produced with a mass number of 277. (wikipedia.org)
  • metals
  • Rubidium also follows the trend of increasing reactivity as the atomic number increases in the alkali metals, for it is more reactive than potassium, but less so than caesium. (wikipedia.org)
  • Palladium can be found as a free metal and alloyed with other platinum-group metals. (americanelements.com)
  • Many chemistry textbooks and printed periodic tables classify La and Ac as Group 3 elements and transition metals, since their atomic ground-state configurations are s2d1 like Sc and Y. The elements Ce-Lu are considered as the "lanthanide" series (or "lanthanoid" according to IUPAC) and Th-Lr as the "actinide" series. (wikipedia.org)
  • However La and Ac are exceptions to the Aufbau principle with electron configuration [ ]s2d1 (not [ ]s2f1 as the Aufbau principle predicts) so it is not clear from atomic electron configurations whether La or Lu (Ac or Lr) should be considered as transition metals. (wikipedia.org)
  • periodic table
  • The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behaviour of the elements as their atomic number increases: a new row is begun when chemical behaviour begins to repeat, meaning that elements with similar behaviour fall into the same vertical columns. (wikipedia.org)
  • orbits
  • Sommerfeld retained Bohr's planetary model, but added mildly elliptical orbits (characterized by additional quantum numbers ℓ and m) to explain the fine spectroscopic structure of some elements. (wikipedia.org)
  • chemical
  • The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems. (rsc.org)
  • copper
  • Silver crystallizes in a face-centered cubic lattice with bulk coordination number 12, where only the single 5s electron is delocalized, similarly to copper and gold. (wikipedia.org)
  • eighteen
  • Eighteen other radioisotopes have been characterized with atomic weights ranging from 90.94948(64) u (91Pd) to 122.93426(64) u (123Pd). (wikipedia.org)
  • gold
  • he malleability of palladium is similar to that of gold. (smore.com)
  • Like gold, palladium can be beaten into leaf as thin as 1/250,000 in. (vias.org)
  • The album was popular enough to reach number 4 in the UK Albums Chart upon its release and to be certified Gold by the British Phonographic Industry four days after the release, on 7 March 2003. (wikipedia.org)
  • uses
  • Valentino Rossi, one of the most successful motorcycle riders of all time, uses 46 as his number in the MotoGP motorcycle world championship, and has been using this number in homage to his father since he started racing as a youngster. (wikipedia.org)
  • fundamental
  • Human cytogenetics was born in 1956 with the fundamental, but empowering, discovery that normal human cells contain 46 chromosomes. (wikipedia.org)
  • Greek
  • The number corresponding to the word "ADAM" where A=1, D=4, M=40 (on the analogy of the numeric values of letters in ancient alphabets, such as Hebrew and Greek). (wikipedia.org)