Question

the following illustration is an example of what.

fusion

alpha decay

beta decay

gamma decay

Explanation:

Step1: Recall nuclear reaction types

Fusion is combining nuclei. Alpha decay emits a helium - like particle (\(^{4}_{2}\text{He}\)). Beta decay involves electron - like emission. Gamma decay is photon emission.

Step2: Analyze the reaction

Here, \(^{226}_{88}\text{Ra}\) decays to \(^{222}_{86}\text{Rn}\) and \(^{4}_{2}\text{He}\). This matches alpha decay (\(^{A}_{Z}\text{X}\to^{A - 4}_{Z - 2}\text{Y}+^{4}_{2}\text{He}\)).

Answer:

alpha decay