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Description
f block elements in the periodic table appear in two chemical series like 4f block (lanthanides or rare earth elements) and 5f block (actinides or actinoids). The 4f-block chemical elements or lanthanides constitute the first inner transition series while actinides constitute the second inner transition metals series for more information about f block Elements

Description
f block elements in the periodic table appear in two chemical series like 4f block (lanthanides or rare earth elements) and 5f block (actinides or actinoids). The 4f-block chemical elements or lanthanides constitute the first inner transition series while actinides constitute the second inner transition metals series for more information about f block Elements