A moderator is used in nuclear reactors in order to
1 Increase the number of neutrons
2 Decrease the number of neutrons
3 Slow down the speed of neutrons
4 Accelerate the neutrons
Actinides are the elements with atomic numbers from 1 36 to 43 2 89 to 103 3 97 to 114 4 101 to 115
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The hardest substance available on earth is 1 Platinum 2 Coal 3 Diamond 4 Gold
13 Answers FCI, University of Ilorin,
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