MCQ
Which of the following is not an actinoid?
- ACurium (Z = 96)
- BCalifornium (Z = 98)
- CUranium (Z = 92)
- DTerbium (Z = 65)
✓
Answer
- Terbium (Z = 65)
Explanation:
Actinoids are elements with Z= 90 - 103. Therefore, Terbium (Z = 65) is not an actinoid. Terbium (Z = 65) is a lanthanoid. $\text{Tb:}\ [\text{xe}]4\text{f}^95\text{d}^06\text{s}^2$
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