Does lanthanum belong to f block . Explain
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Both lanthanum and actinium are d block elements only. Lanthanum is the first element of the 3rd transition series, and the 5d orbitals start getting filled from lanthanum. And so, it has the configuration [Xe]5d1 6s2. The 4f orbitals get filled from the next element (cerium) only.
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Lanthanum belongs to d-block.
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