Question

an element that has a mass number less than 60 is a fissionable element
true
false

Explanation:

Fissionable elements are typically heavy nuclei (mass number generally greater than 230 for fission by slow neutrons, or certain lighter ones under specific conditions, but mass number less than 60 elements are not fissionable as fission involves splitting heavy nuclei. So the statement is false.

Answer:

B. False