in the video lesson sir has asked that is Lanthanum element belongs to lanthanoids? the options were( a:true b:false)the correct choice is true but sir has told its false? kindly clarify....

Asked by APARNA NLVS | 6th Mar, 2013, 10:00: PM

Expert Answer:

Lanthanoid series has fourteen elements starting with cerium Ce (Z = 58) and ending with lutetium, Lu (Z = 71). Lanthanum is not a part of the lanthanoid series but since it resembles closely with other lanthanoids so it is usually included in the discussion of lanthanoids.

Answered by  | 7th Mar, 2013, 10:51: AM

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