JEE Advanced Chemistry question
Which of the following is not an actinoid?
Answer: (D)
Solution
Americium (Am), curium (Cm) and fermium (Fm) are all actinoids. Thulium (Tm, Z = 69) is instead a lanthanide, not an actinoid.
Which of the following is not an actinoid?
Americium (Am), curium (Cm) and fermium (Fm) are all actinoids. Thulium (Tm, Z = 69) is instead a lanthanide, not an actinoid.