Power Plant Engineering
Pick up the wrong statement

Fast reactor uses moderator
Slow or thermal neutrons have energy of the order or 0.025 eV
Fast neutrons have energies above 1000 eV
In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator

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Power Plant Engineering
Isotopes of same elements have

Same atomic number and different masses
Same chemical properties but different atomic numbers
Different chemical properties and same atomic numbers
Different masses and different atomic numbers

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