What is the primary concern regarding the emission of alpha particles from radioactive substances?

The primary concern regarding the emission of alpha particles from radioactive substances is that they pose a significant health risk when ingested or inhaled. Alpha particles, while having low penetration power and being unable to pass through the skin, can cause intense damage to biological tissues if they enter the body. This can happen through inhalation or ingestion of radioactive materials that emit alpha particles. Once inside the body, alpha particles can interact with nearby cells and tissues, potentially leading to significant cellular damage, mutations, or cancer.

The health risks associated with alpha particle exposure emphasize the need for caution in environments where radioactive materials are present, particularly in areas like homes with elevated levels of radon gas. Understanding these risks helps establish the safety protocols required for handling radioactive substances and ensuring public health safety.