When handling mercury, what is crucial to ensure safety?

The importance of ensuring safety when handling mercury is multifaceted, and all listed precautions contribute to a comprehensive safety protocol. Using a smooth non-metallic pan, for instance, is critical because metal containers can react with mercury, potentially compromising containment and safety. Ventilation is essential due to mercury's toxicity; proper airflow prevents the accumulation of harmful vapors, which can lead to health hazards. Preventing prolonged exposure to air is important as well because mercury can oxidize or evaporate, leading to dangerous exposure levels.

By consistently applying all these practices, one minimizes the risk of mercury exposure and spills, creating a safer working environment. Thus, the answer encompasses a holistic approach to safety when working with hazardous materials like mercury.