metalloid

Examples of metalloid in the following topics:

• Elemental Boron

  • Boron is produced by cosmic ray spallation, is a metalloid, and is essential to life.
  • Chemically uncombined boron, which is classified as a metalloid, is not found naturally on Earth.

• Elements and Compounds

  • The chemical elements are divided into the metals, the metalloids, and the non-metals.
  • Metalloids have some characteristics of metals and some characteristics of non-metals.
  • Silicon and arsenic are metalloids.
  • The periodic table shows 118 elements, including metals (blue), nonmetals (red), and metalloids (green).

• The Periodic Table

  • The elements at the boundary between the metallic elements (grey elements) and nonmetal elements (green elements) are metalloid in character (pink elements).
  • Within the p-block at the boundary between the metallic elements (grey elements) and nonmetal elements (green elements) there is positioned boron and silicon that are metalloid in character (pink elements), i.e., they have low electrical conductivity that increases with temperature.

• The Periodic Table

  • An introduction to the periodic table which identifies metals, ,nonmetals, and metalloids by location and compares and contrasts the physical properties of metals and nonmetals.

• Properties of Hydrogen

  • Compounds that have hydrogen bonding with metals and metalloids are known as hydrides.

• General Trends in Chemical Properties

  • The p block includes the last six groups, which are Groups 13 to 18 in IUPAC (3A to 8A in American), and contains, among others, all of the metalloids.

• Variation of Physical Properties Within a Group

  • Poor metals and metalloids (somewhat metal, somewhat non-metal) are in the lower left of the p block.

• Oxides

  • Metals tend to form basic oxides, non-metals tend to form acidic oxides, and amphoteric oxides are formed by elements near the boundary between metals and non-metals (metalloids).