Multiple choice

Which of the following statements are false regarding f-block elements?

  1. The actinides generally have lower ionization enthalpies than lanthanides.
  2. Lanthanides are silvery white metals because of f-f transition.
  3. All lanthanides are non-radioactive.
  4. Uranium belongs to the lanthanides.

Select the correct answer using codes given below:

  1. 1 and 2

  2. 1 and 4

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

All lanthanides are non-radioactive, except promethium. Uranium belongs to the family of rare earth elements, known as the actinides or actinoids.

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