Question

why lanthinide and actinide are shown at bottom of periodic table ?


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Answer 1

The two rows of elements present at the bottom of the periodic table are called the 4f series or lanthanoids and 5f or actanoids. They are also called innertransition elements.Hence they are placed separately in theperiodic table

Answer 2

Answer:

because they will destroy the shape of the periodic table if they are not placed at the bottom of the periodic table......