What is alpha radiation composed of?

Alpha radiation is composed of 2 protons and 2 neutrons, which can be understood as a helium nucleus. This composition is significant because it contributes to the properties of alpha radiation, including its relatively large mass compared to other types of radiation, such as beta or gamma radiation.

When analyzing the choices, it is important to note that the correct option refers to the structure of the helium nucleus, which is essential for understanding alpha decay processes in radioactive elements. Alpha particles are emitted during certain types of nuclear reactions, resulting in a decrease in the atomic number of the nucleus by two and the mass number by four—effectively transforming the original atom into a different element.

Understanding the nature of alpha particles helps in various applications, including radiation safety and nuclear reactions, emphasizing the unique characteristics that distinguish alpha radiation from other forms of radiation.