what are lanthanoides and actinoides
Asked by sonaisha | 22nd Dec, 2008, 02:41: PM
Lanthanum (Z=57) and next 14 elements (Z= 58-71) which follow it are called lanthanoids.
Actinium (Z=89) and next 14 elements (Z= 90-103) which follow it are called actinoides .
Answered by | 24th Dec, 2008, 11:33: AM
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