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Actinides and lanthanides lose electrons and form cations.
Lanthanides have 6 electron shells. Actinides have 7 electron shells.
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Elements from atomic number 57 (Lanthanum) to 71 (Lutetium) are called the Lanthanides. Lanthanide means "like Lanthanum" and so, the Lanthanides are based on Lanthanum. Only one of the Lanthanides is radioactive: Promethium (Pm - No. 61)
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Wht is the difference between Lanthanides and Actinides?
The 4f series is referred to as the Lanthanides.
describe the complex formation by lanthanides?
Atoms first occupy the 4f level in the Lanthanide series, beginning with Cerium (Ce).
Actinides and lanthanides lose electrons and form cations.
although the chemical behaviour of all lanthanide ions are almost identical there are slight quantative differences which vary systematically from la to lu . The hydrated radii of ln ions for instance with increase in the atomic number . It is found that the larger the hydrated radius of the ion the less strongly it is bound to the anionic site of an exchange resin . When a solution containing several lanthanides pass slowly through a column of a cation exchange resin the heavier members come through first . The separation can be enhanced by the use of complexing agents like citricacid or citrates. a cation exchange rein like dowex-1 is normally used for adsorption of lanthanide ions . The column is eluted with EDTA . The lanthanides are eluted in the reverse order of their atomic numbers . Polycarboxylates,lactates,hydroxy butyrate and alpha hydroxy carboxylates also can be used as elements . ion exchange method has been used for separation of lanthanides in kilogram quantities for commercial uses
Lanthanides have 6 electron shells. Actinides have 7 electron shells.
Rare Earth elements or lanthanides are placed in the period 6 of the periodic table of Mendeleev. Actinoids are placed in the period 7 of the periodic table of Mendeleev.
It depends on the periodic table. Some have 14 lanthanides and some have 15 lanthanides. Refer to the related link for a Wikipedia article on the lanthanides for more information.
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Lanthanides
They are located in the f-block