People often associate the word “chemical” with “danger,” but only certain elements on the periodic table (all of which fall into the category of “chemical”), present hazards. Read “The periodic table of danger” to understand exactly which elements to look out for, and why.

For additional information, read this article from ThoughtCo., which explains the difference between “radioactivity,” “toxicity,” and “reactivity.” All of those traits, when exhibited in different elements, present dangers to those who handle them—but each in widely varying ways.

And if you happen to be a history buff, learn more here about the link between mercury poisoning and the popular colloquial phrase, “mad as a hatter.”