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The d & f Block Elements — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
Question
Most of the radio active elements are present in:
✓

Answer

  1. Actinoids
Explanation:
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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