Betekenis van:
atomic number 61

atomic number 61
Zelfstandig naamwoord
  • promethium
  • a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium

Synoniemen

Hyperoniemen


Voorbeeldzinnen

  1. technetium (atomic No 43), promethium (atomic No 61), polonium (atomic No 84) and all elements with an atomic number greater than 84;
  2. technetium (atomic No 43), promethium (atomic No 61), polonium (atomic No 84) and all elements with an atomic number greater than 84;