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Why are there fourteen elements in the l...

Why are there fourteen elements in the lanthanoid series?

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To answer the question "Why are there fourteen elements in the lanthanoid series?", we can break down the explanation into several steps: ### Step-by-Step Solution: 1. **Understanding the Lanthanoid Series**: - The lanthanoid series consists of a group of metallic elements that are found in the f-block of the periodic table. They are located at the bottom of the periodic table and include elements with atomic numbers from 58 (Cerium) to 71 (Lutetium). 2. **Identifying the Starting Element**: ...
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The first ionisation energies of the elements of the transition series.