The d & f Block Elements — Chemistry STD 12 Science — Question
Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
Most of the radio active elements are present in:
A
Lanthanoids
✓
Actinoids
C
Representative elements
D
Second transition series
✓
Answer
Correct option: B.
Actinoids
The actinoids are radioactive elements and the earlier members have relatively long half-lives.
The most common and known element is Uranium, which is used as nuclear fuel when its converted into plutonium, through a nuclear reaction.
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