Metalloids

Metalloids are a group of chemical elements that exhibit properties of both metals and nonmetals. They are positioned along the dividing line between metals and nonmetals in the Periodic Table of Elements. The most commonly recognized metalloids are boron, silicon, germanium, arsenic, antimony, tellurium, and polonium.

Characteristics

Metalloids have properties of both metals and nonmetals. They are all semiconductors, making them important in the electronics industry. They can form alloys with metals, and they can form salts when reacting with acids.

Uses

Metalloids have a wide range of uses due to their unique properties. Silicon, for example, is used in the production of semiconductor devices, glass, and ceramics. Arsenic is used in the production of pesticides, herbicides, and insecticides. Antimony and tellurium are used in the production of flame retardants and alloys, respectively.

Health and Environmental Effects

Exposure to metalloids can have both beneficial and harmful effects on health. For example, small amounts of arsenic are used in medicine, but larger amounts can be toxic. Similarly, exposure to certain forms of antimony can cause health problems.

Metalloids can also have significant environmental impacts. For example, arsenic can contaminate water supplies, leading to health problems for people and wildlife.

See Also

• Chemical element
• Periodic Table of Elements
• Metal
• Nonmetal
• Semiconductor

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