elements with high density and toxicity, like lead and mercury
Heavy metals are a group of elements that have a high atomic weight and a density at least five times greater than that of water. Common examples include lead, mercury, cadmium, and arsenic. These metals can be toxic to living organisms at low concentrations, leading to various health issues such as neurological damage, kidney failure, and even cancer. They are often found in industrial waste, contaminated water, and certain consumer products, making their regulation and monitoring crucial for public health and environmental safety.