Question

Q- What are lanthanides and actinides ?

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Answer 1

Answer:

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Explanation:

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Answer 2

Lanthanides

They are the series of the chemical elements comprises the 15 metallic chemical elements with atomic number 57 to 71 . These elements along with chemically similar elements - scandium and yttrium .

Actinides

They are also the series of the chemical elements comprises with the 15 metallic chemical elements with the atomic number 89 to 103 . The actinides were the most known for the elements - uranium & plutonium .