Among the following elements, the one that is not an actinoid is:
| 1. | Curium (Z=96) | 2. | Californium (Z=98) |
| 3. | Uranium (Z=92) | 4. | Terbium (Z=65) |
HINT: Actinoids atomic number start from 89.
Explanation:
Elements with atomic number, Z=89 to 103 are called actinoids. Thus, Terbium (Z=65) is not an actinoid.
Terbium belong to lanthanoids.
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