1. Tardigrade
  2. Question
  3. Chemistry
  4. There are 14 elements in actinoid series. Which of the following elements does not belong to this series?

Q. There are 14 elements in actinoid series. Which of the following elements does not belong to this series?

 1823  185 Jharkhand CECEJharkhand CECE 2013 Report Error

Solution:

Actinoid series is with atomic number 90 to 103. Thulium(Tm) has atomic number 69.