Mendeleev · Science

Metals, nonmetals and metalloids

A useful classification — and where its boundaries become less simple.

Metals, nonmetals and metalloids

Most elements are metals, while nonmetals occupy a smaller region of the table. Metalloids sit near the boundary and show intermediate or context-dependent behaviour. The category is useful, but its exact membership can vary between sources.

A useful classification — and where its boundaries become less simple.