Which describes nuclear fissiom

Question

Stars when a neutron slams into an atom,causing the larger atom to split into two smaller atoms

Starts when two atoms slam together,causing the larger atom to split into two smaller atoms

Starts when two atoms slam together to form one,heavier atom

Starts when a neutron slams into an atom,causing two atoms to form one,heavier atom

Answer 1

The correct description of nuclear fission is:

"Starts when a neutron slams into an atom, causing the larger atom to split into two smaller atoms."

In nuclear fission, a heavy nucleus (such as uranium-235 or plutonium-239) absorbs a neutron, becomes unstable, and then splits into two smaller nuclei, along with a few neutrons and a large amount of energy.