The process of radioactivity decay is unpredictable and irreversible. Which option would be an appropriate model of the radioactive decay of a group of atoms?

• Popping a bag of popcorn
• Petals falling from a flower
• Throwing tennis balls over a fence
• Breaking off pieces of wet clay

The option that would be an appropriate model of the radioactive decay of a group of atoms is ''Petals falling from a flower''.

The appropriate model of the radioactive decay of a group of atoms would be the petals falling from a flower.

The appropriate model of the radioactive decay of a group of atoms would be the petals falling from a flower.

Explanation:
Radioactive decay is a random and spontaneous process. It cannot be predicted exactly when a particular atom will decay. Similarly, the falling of petals from a flower is a random and unpredictable process. Each petal falls independently, without being influenced by the falling of other petals. This is similar to how atoms decay in a radioactive material.

On the other hand, the other options do not accurately represent the unpredictable nature of radioactive decay. Popping a bag of popcorn, throwing tennis balls over a fence, and breaking off pieces of wet clay are all processes that can be influenced or controlled by external factors. They do not exhibit the inherent randomness and irreversibility of radioactive decay.