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GK QUESTION#3314

Which soft, silvery lanthanide metal has atomic number 59?

  1. ANeodymium
  2. BPraseodymiumCorrect answer
  3. CPromethium
  4. DGadolinium
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Answer

B. Praseodymium

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Explanation

Praseodymium, symbol Pr, is the lanthanide with atomic number 59 and is a soft, silvery metal. Neodymium, promethium and gadolinium have atomic numbers 60, 61 and 64 respectively. The atomic number uniquely identifies praseodymium without relying on a colour description.

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