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Question: Which of the following is NOT a real element?

Options:

  1.  Praseodymium
  2.  Vitrainium
  3.  Hassium
  4.  Lutetium

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2. Vitrainium

Vitrainium is not a real element.


More information:
  1.  Praseodymium - [Xe] 4f36s2
  2.  Vitrainium
  3.  Hassium - [Rn]7s25f146d6
  4.  Lutetium - [Xe] 4f145d16s2

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