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2015-03-24T21:39:00+05:30

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In chemistry , Lanthanide is an chemical element in the group of elements that have the atomic numbers 57 to 71 in the periodic table Actinides are the group of Elements from 90 to 103 (after actinium) .
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2015-03-24T21:39:28+05:30

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Lanthanide and actinide series contain elements that are placed at the bottom of the periodic table.They contain elements which have electrons on f orbitals.They contain radioactive elements too.
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