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Write one similarity and one difference between the chemistry of lanthanoids and that of actinoids.

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**Step-by-Step Text Solution:** 1. **Identify the Elements:** - Lanthanoids and actinoids are two series of elements in the periodic table. Lanthanoids consist of the 15 elements from lanthanum (La) to lutetium (Lu), while actinoids consist of the 15 elements from actinium (Ac) to lawrencium (Lr). 2. **Determine the Similarity:** - Both lanthanoids and actinoids primarily exhibit a common oxidation state of +3. This means that in their compounds, both series of elements tend to lose three electrons, resulting in a +3 charge. ...
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