ENVIRONMENT
- dúil idirlinne Reference an Ghníomhaireacht Eorpach Comhshaoil (GEC)
- ga
- transition element
- en
- Definition 1.One of a group of metallic elements in which the members have the filling of the outermost shell to 8 electrons interrupted to bring the penultimate shell from 8 to 18 or 32 electrons; includes elements 21 through 29 (scandium through copper, 39 through 47 (yttrium through silver, 57 through 79 (lanthanum through gold, and all known elements from 89 (actinium on. Reference 1.MGH;