Final answer:
When an alpha particle (^4He) is bombarded with ^10B, it produces ^14N.
Step-by-step explanation:
When an alpha particle (^4He) is bombarded with ^10B, it produces ^14N. The balanced nuclear equation for this reaction is:
^10B + ^4He → ^14N
The alpha particle consists of two protons and two neutrons, so when it collides with the ^10B nucleus (which has 5 protons and 5 neutrons), one of the neutrons is released, resulting in the production of the nitrogen-14 (^14N) nucleus.