Metalloids

Definition

Metalloids are elements with properties intermediate between metals and nonmetals. They are found along the staircase line on the Periodic Table.

5 Must Know Facts For Your Next Test

1. Metalloids typically exhibit both metallic and non-metallic properties.
2. Common metalloids include boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), and tellurium (Te).
3. Metalloids often act as semiconductors, making them important in electronics.
4. The physical appearance of metalloids can be shiny like metals but they are brittle like nonmetals.
5. Metalloids often form amphoteric oxides, meaning their oxides can react with both acids and bases.

Review Questions

• What are some common characteristics shared by metalloids?
• List at least three elements that are classified as metalloids.
• Why are metalloids significant in the field of electronics?

Related terms

Semiconductor:

A material that has electrical conductivity between that of a conductor and an insulator; commonly used in electronic devices.

Periodic Table:

A tabular arrangement of chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties.

Amphoteric Oxide: An oxide that can act as either an acid or a base in a chemical reaction.