Which element is noted for having severe vomiting as a prominent symptom upon exposure?

Antimony is recognized for causing severe vomiting upon exposure, which is a key symptom associated with its toxicity. This element, found in various industrial applications, can lead to gastrointestinal distress when ingested or inhaled in significant amounts. The mechanism behind the vomiting symptom stems from its irritant properties on the stomach and intestinal lining, leading to an inflammatory response that triggers nausea and vomiting.

In contrast, while both lead and cadmium are toxic and can cause numerous health issues, they do not typically present vomiting as a predominant symptom of exposure. Lead exposure often leads to neurological problems and blood-related issues, while cadmium toxicity may result in kidney damage and respiratory issues. Arsenic, though it can cause gastrointestinal symptoms including nausea and vomiting, is more commonly associated with a broader range of systemic effects and its acute toxicity does not predominantly highlight vomiting as a key feature. Thus, antimony stands out in this context for its association with severe vomiting, making it the most relevant answer.