Which of the following is an f-block element and a lanthanoid?

  1. Uranium
  2. Europium
  3. Hafnium
  4. Rutherfordium

📝 Detailed explanation

Europium (Eu) is a lanthanoid and belongs to the f-block. Uranium is an actinoid, while hafnium and rutherfordium are d-block elements.
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