Here's why:

* Fusion: Fusion is a process where two or more atomic nuclei combine to form one or more different atomic nuclei and subatomic particles (neutrons or protons).

* In this case: A beryllium atom (⁴Be) is bombarded with an alpha particle (⁴He). This results in the formation of a carbon atom (¹²C) and a neutron (¹n).

Here's the reaction equation:

⁴Be + ⁴He → ¹²C + ¹n

Key points:

* Energy Release: Fusion reactions generally release a tremendous amount of energy. This is why they are explored as a potential energy source.

* Nuclear Transformation: The reaction fundamentally changes the atoms involved, resulting in a new element (carbon) being formed from beryllium.