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Lanthanide for which +II and +III oxida...

Lanthanide for which +II and +III oxidation states are common is

A

La

B

Nd

C

Ce

D

Eu

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The correct Answer is:
To solve the question regarding which lanthanide has common +II and +III oxidation states, we will analyze the oxidation states of the given lanthanides: lanthanum, neodymium, cerium, and europium. ### Step-by-Step Solution: 1. **Identify the Lanthanides**: The lanthanides provided in the question are: - Lanthanum (La) - Neodymium (Nd) - Cerium (Ce) - Europium (Eu) 2. **Determine the Atomic Numbers and Electronic Configurations**: - **Lanthanum (La)**: Atomic number = 57 - Electronic configuration: [Xe] 5d¹ 6s² - **Neodymium (Nd)**: Atomic number = 60 - Electronic configuration: [Xe] 4f⁴ 6s² - **Cerium (Ce)**: Atomic number = 58 - Electronic configuration: [Xe] 4f¹ 5d¹ 6s² - **Europium (Eu)**: Atomic number = 63 - Electronic configuration: [Xe] 4f⁷ 6s² 3. **Identify Common Oxidation States**: - **Lanthanum**: Common oxidation state is +3. - **Neodymium**: Common oxidation states are +2, +3, and +4. - **Cerium**: Common oxidation states are +3 and +4. - **Europium**: Common oxidation states are +2 and +3. 4. **Analyze the Oxidation States**: - We are looking for a lanthanide that has both +2 and +3 oxidation states as common. - **Lanthanum** does not have +2 oxidation state. - **Neodymium** has +2 and +3, but also +4. - **Cerium** does not have +2 oxidation state. - **Europium** has both +2 and +3 oxidation states. 5. **Conclusion**: The lanthanide for which +II and +III oxidation states are common is **Europium (Eu)**. ### Final Answer: **Europium (Eu)** ---
To solve the question regarding which lanthanide has common +II and +III oxidation states, we will analyze the oxidation states of the given lanthanides: lanthanum, neodymium, cerium, and europium. ### Step-by-Step Solution: 1. **Identify the Lanthanides**: The lanthanides provided in the question are: - Lanthanum (La) - Neodymium (Nd) - Cerium (Ce) ...
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