Here's why:
* Alpha particles consist of two protons and two neutrons, which are bound together to form a particle identical to the nucleus of a helium atom.
* This makes them positively charged due to the two protons.
* Alpha decay is a common type of radioactive decay where the unstable nucleus of a radioactive element emits an alpha particle, transforming the original atom into a different element.
Let me know if you have any other questions!