Final answer:
When a tiny particle is shot into the middle of an atom, it is most likely to be repelled by the atom's nucleus due to the repulsive electrostatic force between the like charges.
Step-by-step explanation:
When a tiny particle is shot into the middle of an atom, the most likely outcome is that the particle will be repelled by the atom's nucleus. This is because the nucleus contains positively charged protons, and the particle will experience a repulsive electrostatic force from the nucleus. The repulsion occurs due to the like charges of the particle and the protons.