| 释义 |
transition element
noun
or transition metal
: any of the series of metals (as scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel) that fall in the center of the long form of the periodic table, that include as inner series the lanthanide series and the actinide series, that have valence electrons in two shells instead of only one, and that are characterized in most cases by variable oxidation states and magnetic properties |