Power Plant Engineering
Pick up the wrong statement

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

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Power Plant Engineering
Isotopes of same elements have

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

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